Disable truncate testing with LSM

############################################

#  RUN PARAMETERS

############################################

abort=0

alter=0

auto_throttle=1

backups=0

bitcnt=3

bloom=1

bloom_bit_count=15

bloom_hash_count=17

bloom_oldest=0

cache=300

cache_minimum=20

checkpoints=wiredtiger

checkpoint_log_size=62

checkpoint_wait=85

checksum=on

chunk_size=10

compaction=0

compression=snappy

data_extend=0

data_source=lsm

delete_pct=13

dictionary=0

direct_io=0

encryption=rotn-7

evict_max=3

file_type=row-store

firstfit=0

huffman_key=0

huffman_value=0

independent_thread_rng=1

in_memory=0

insert_pct=61

internal_key_truncation=1

internal_page_max=9

isolation=random

key_gap=14

key_max=256

key_min=256

leaf_page_max=9

leak_memory=0

logging=1

logging_archive=0

logging_compression=lz4-noraw

logging_file_max=146059

logging_prealloc=0

long_running_txn=0

lsm_worker_threads=4

merge_max=17

mmap=1

modify_pct=19

ops=100000

prefix_compression=0

prefix_compression_min=0

quiet=1

read_pct=2

rebalance=1

repeat_data_pct=58

reverse=0

rows=100000

runs=1

salvage=1

split_pct=90

statistics=0

statistics_server=1

threads=1

timer=4

transaction_timestamps=0

transaction-frequency=49

truncate=1

value_max=2108

value_min=256

verify=1

wiredtiger_config=

write_pct=5

############################################

(gdb) where

#0  0x000000000057b356 in __wt_buf_set (session=0x7f96245f4210, 

    buf=0x7f96041c97d0, data=0x7f96044fdc38, size=256)

    at ./src/include/buf.i:84

#1  0x000000000057f99d in __cursor_key_order_check_row (

    session=0x7f96245f4210, cbt=0x7f96041c94e0, next=true)

    at src/btree/bt_curnext.c:415

#2  0x000000000057fb49 in __wt_cursor_key_order_check (session=0x7f96245f4210, 

    cbt=0x7f96041c94e0, next=true) at src/btree/bt_curnext.c:448

#3  0x000000000058027d in __wt_btcur_next (cbt=0x7f96041c94e0, 

    truncating=false) at src/btree/bt_curnext.c:669

#4  0x0000000000522f1e in __curfile_next (cursor=0x7f96041c94e0)

    at src/cursor/cur_file.c:96

#5  0x000000000055d31c in __clsm_next (cursor=0x7f960404bd40)

    at src/lsm/lsm_cursor.c:959

#6  0x000000000057336e in __wt_range_truncate (start=0x7f960404bd40, 

    stop=0x7f96045af540) at src/schema/schema_truncate.c:121

#7  0x0000000000573520 in __wt_schema_range_truncate (session=0x7f96245f4210, 

    start=0x7f960404bd40, stop=0x7f96045af540)

    at src/schema/schema_truncate.c:155

#8  0x000000000048a4f7 in __wt_session_range_truncate (session=0x7f96245f4210, 

    uri=0x0, start=0x7f960404bd40, stop=0x7f96045af540)

    at src/session/session_api.c:1421

#9  0x000000000048ae26 in __session_truncate (wt_session=0x7f96245f4210, 

    uri=0x0, start=0x7f960404bd40, stop=0x7f96045af540, config=0x0)

    at src/session/session_api.c:1492

#10 0x000000000040a9af in row_truncate (tinfo=0x4fb0210, cursor=0x7f960404bd40)

    at ops.c:1619