Make WT_CURSOR.modify require explicit transactions

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#  RUN PARAMETERS

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abort=0

alter=0

auto_throttle=1

backups=0

bitcnt=6

bloom=1

bloom_bit_count=31

bloom_hash_count=30

bloom_oldest=0

cache=20

cache_minimum=20

checkpoints=on

checkpoint_log_size=119

checkpoint_wait=77

checksum=uncompressed

chunk_size=9

compaction=0

compression=snappy

data_extend=0

data_source=table

delete_pct=0

dictionary=0

direct_io=0

encryption=none

evict_max=5

file_type=row-store

firstfit=0

huffman_key=0

huffman_value=0

independent_thread_rng=0

in_memory=0

insert_pct=31

internal_key_truncation=1

internal_page_max=17

isolation=snapshot

key_gap=2

key_max=91

key_min=14

leaf_page_max=13

leak_memory=0

logging=0

logging_archive=1

logging_compression=none

logging_file_max=87073

logging_prealloc=0

long_running_txn=0

lsm_worker_threads=4

merge_max=15

mmap=0

modify_pct=69

ops=0

prefix_compression=1

prefix_compression_min=0

prepare=1

quiet=1

read_pct=0

rebalance=1

repeat_data_pct=1

reverse=0

rows=1000000

runs=1

salvage=1

split_pct=50

statistics=0

statistics_server=0

threads=13

timer=4

timing_stress_checkpoint=0

timing_stress_lookaside_sweep=0

timing_stress_split_1=0

timing_stress_split_2=0

timing_stress_split_3=0

timing_stress_split_4=0

timing_stress_split_5=0

timing_stress_split_6=0

timing_stress_split_7=0

timing_stress_split_8=1

transaction_timestamps=1

transaction-frequency=64

truncate=1

value_max=3599

value_min=7

verify=1

wiredtiger_config=

write_pct=0

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