Fix exact return when we place the history store cursor on e exact key initially

format.sh: job in /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/test/format/RUNDIR.3 failed

 [2021/03/20 10:43:07.678]     t: process 28900 running

 [2021/03/20 10:43:07.678]     [1616236979:750400][28900:0x3ff87fff910], file:WiredTigerHS.wt, WT_CURSOR.search_near: __curhs_search_near, 742: (cmp == 0 && *exactp == 0) || (cmp < 0 && *exactp < 0) || (cmp > 0 && *exactp > 0)

 [2021/03/20 10:43:07.678]     [1616236979:750451][28900:0x3ff87fff910], file:WiredTigerHS.wt, WT_CURSOR.search_near: __wt_abort, 28: aborting WiredTiger library

 [2021/03/20 10:43:07.678]     Aborted (core dumped) 

Backtrace:

 [2021/03/20 10:43:07.678]     /lib/s390x-linux-gnu/libc.so.6(gsignal+0x8c)[0x3ff8d5bdef4]

 [2021/03/20 10:43:07.678]     /lib/s390x-linux-gnu/libc.so.6(abort+0x172)[0x3ff8d5bf37a]

 [2021/03/20 10:43:07.678]     ./t(__wt_ext_map_windows_error+0x0)[0x1008d50]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/include/btree_cmp_inline.h:91(__wt_lex_compare)[0x10678a8]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/cursor/cur_hs.c:542(__curhs_search_near_helper)[0x106aed6]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/history/hs_rec.c:671(__wt_hs_delete_key_from_ts)[0x12216a6]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/reconcile/rec_row.c:926(__wt_rec_row_leaf)[0x12571f6]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/reconcile/rec_write.c:191(__reconcile)[0x10c8862]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/evict/evict_page.c:702(__evict_review)[0x1084522]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/evict/evict_page.c:159(__wt_evict)[0x10856de]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/evict/evict_lru.c:2311(__evict_page)[0x107aacc]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/evict/evict_lru.c:1140(__evict_lru_pages)[0x107b2f8]

 [2021/03/20 10:43:07.678]     ./t(__wt_evict_thread_run+0x8e)[0x108072e]

 [2021/03/20 10:43:07.678]     /data/mci/d76bd810b69befe9203ce3d0ffcefa84/wiredtiger/build_posix/../src/support/thread_group.c:31(__thread_run)[0x111f2de]

 [2021/03/20 10:43:07.678]     /lib/s390x-linux-gnu/libpthread.so.0(+0x7aa8)[0x3ff8d907aa8]

 [2021/03/20 10:43:07.678]     /lib/s390x-linux-gnu/libc.so.6(+0xfa936)[0x3ff8d67a936]

 [2021/03/20 10:43:07.678]     ??:0(??)[0x0] 

[2021/03/20 10:43:07.679]     ############################################

 [2021/03/20 10:43:07.679]     #  RUN PARAMETERS: V2

 [2021/03/20 10:43:07.679]     ############################################

 [2021/03/20 10:43:07.679]     assert.commit_timestamp=0

 [2021/03/20 10:43:07.679]     assert.read_timestamp=0

 [2021/03/20 10:43:07.679]     backup=0

 [2021/03/20 10:43:07.679]     backup.incremental=off

 [2021/03/20 10:43:07.679]     backup.incr_granularity=1761

 [2021/03/20 10:43:07.679]     btree.bitcnt=6

 [2021/03/20 10:43:07.679]     btree.compression=snappy

 [2021/03/20 10:43:07.679]     btree.dictionary=0

 [2021/03/20 10:43:07.679]     btree.huffman_value=0

 [2021/03/20 10:43:07.679]     btree.internal_key_truncation=1

 [2021/03/20 10:43:07.679]     btree.internal_page_max=9

 [2021/03/20 10:43:07.679]     btree.key_gap=10

 [2021/03/20 10:43:07.679]     btree.key_max=55

 [2021/03/20 10:43:07.679]     btree.key_min=16

 [2021/03/20 10:43:07.679]     btree.leaf_page_max=12

 [2021/03/20 10:43:07.679]     btree.memory_page_max=3

 [2021/03/20 10:43:07.679]     btree.prefix_compression=1

 [2021/03/20 10:43:07.679]     btree.prefix_compression_min=0

 [2021/03/20 10:43:07.679]     btree.repeat_data_pct=73

 [2021/03/20 10:43:07.679]     btree.reverse=0

 [2021/03/20 10:43:07.679]     btree.split_pct=59

 [2021/03/20 10:43:07.679]     btree.value_max=3809

 [2021/03/20 10:43:07.679]     btree.value_min=11

 [2021/03/20 10:43:07.679]     cache=96

 [2021/03/20 10:43:07.679]     cache.evict_max=3

 [2021/03/20 10:43:07.679]     cache.minimum=20

 [2021/03/20 10:43:07.679]     checkpoint=on

 [2021/03/20 10:43:07.679]     checkpoint.log_size=174

 [2021/03/20 10:43:07.679]     checkpoint.wait=78

 [2021/03/20 10:43:07.679]     disk.checksum=uncompressed

 [2021/03/20 10:43:07.679]     disk.data_extend=0

 [2021/03/20 10:43:07.679]     disk.direct_io=0

 [2021/03/20 10:43:07.679]     disk.encryption=none

 [2021/03/20 10:43:07.679]     disk.firstfit=0

 [2021/03/20 10:43:07.679]     disk.mmap=1

 [2021/03/20 10:43:07.679]     disk.mmap_all=0

 [2021/03/20 10:43:07.679]     format.abort=0

 [2021/03/20 10:43:07.679]     format.independent_thread_rng=1

 [2021/03/20 10:43:07.679]     format.major_timeout=0

 [2021/03/20 10:43:07.679]     logging=1

 [2021/03/20 10:43:07.679]     logging.archive=0

 [2021/03/20 10:43:07.679]     logging.compression=none

 [2021/03/20 10:43:07.679]     logging.file_max=176407

 [2021/03/20 10:43:07.679]     logging.prealloc=1

 [2021/03/20 10:43:07.679]     lsm.auto_throttle=1

 [2021/03/20 10:43:07.679]     lsm.bloom=1

 [2021/03/20 10:43:07.679]     lsm.bloom_bit_count=27

 [2021/03/20 10:43:07.679]     lsm.bloom_hash_count=6

 [2021/03/20 10:43:07.679]     lsm.bloom_oldest=0

 [2021/03/20 10:43:07.679]     lsm.chunk_size=2

 [2021/03/20 10:43:07.679]     lsm.merge_max=17

 [2021/03/20 10:43:07.679]     lsm.worker_threads=4

 [2021/03/20 10:43:07.679]     ops.alter=0

 [2021/03/20 10:43:07.679]     ops.compaction=0

 [2021/03/20 10:43:07.679]     ops.hs_cursor=1

 [2021/03/20 10:43:07.679]     ops.pct.delete=8

 [2021/03/20 10:43:07.679]     ops.pct.insert=7

 [2021/03/20 10:43:07.679]     ops.pct.modify=17

 [2021/03/20 10:43:07.679]     ops.pct.read=59

 [2021/03/20 10:43:07.679]     ops.pct.write=9

 [2021/03/20 10:43:07.679]     ops.prepare=0

 [2021/03/20 10:43:07.679]     ops.random_cursor=0

 [2021/03/20 10:43:07.679]     ops.salvage=0

 [2021/03/20 10:43:07.679]     ops.truncate=1

 [2021/03/20 10:43:07.679]     ops.verify=1

 [2021/03/20 10:43:07.679]     quiet=1

 [2021/03/20 10:43:07.679]     runs=1

 [2021/03/20 10:43:07.679]     runs.in_memory=0

 [2021/03/20 10:43:07.679]     runs.ops=0

 [2021/03/20 10:43:07.679]     runs.rows=100000

 [2021/03/20 10:43:07.679]     runs.source=table

 [2021/03/20 10:43:07.679]     runs.threads=6

 [2021/03/20 10:43:07.679]     runs.timer=4

 [2021/03/20 10:43:07.679]     runs.type=row-store

 [2021/03/20 10:43:07.679]     runs.verify_failure_dump=0

 [2021/03/20 10:43:07.679]     statistics=0

 [2021/03/20 10:43:07.679]     statistics.server=1

 [2021/03/20 10:43:07.679]     stress.aggressive_sweep=0

 [2021/03/20 10:43:07.679]     stress.checkpoint=0

 [2021/03/20 10:43:07.679]     stress.checkpoint_prepare=0

 [2021/03/20 10:43:07.680]     stress.hs_checkpoint_delay=0

 [2021/03/20 10:43:07.680]     stress.hs_search=0

 [2021/03/20 10:43:07.680]     stress.hs_sweep=0

 [2021/03/20 10:43:07.680]     stress.split_1=0

 [2021/03/20 10:43:07.680]     stress.split_2=0

 [2021/03/20 10:43:07.680]     stress.split_3=0

 [2021/03/20 10:43:07.680]     stress.split_4=0

 [2021/03/20 10:43:07.680]     stress.split_5=0

 [2021/03/20 10:43:07.680]     stress.split_6=0

 [2021/03/20 10:43:07.680]     stress.split_7=0

 [2021/03/20 10:43:07.680]     stress.split_8=0

 [2021/03/20 10:43:07.680]     transaction.frequency=100

 [2021/03/20 10:43:07.680]     transaction.isolation=snapshot

 [2021/03/20 10:43:07.680]     transaction.rollback_to_stable=0

 [2021/03/20 10:43:07.680]     transaction.timestamps=1

 [2021/03/20 10:43:07.680]     wiredtiger.config=

 [2021/03/20 10:43:07.680]     wiredtiger.rwlock=1

 [2021/03/20 10:43:07.680]     wiredtiger.leak_memory=0

 [2021/03/20 10:43:07.680]     ############################################