test rollback prior to set/deletes
test rollback prior to set/deletes

set and delete docs and record seqnum
do more sets/deletes
rollback db and compare with verification db

Change-Id: I11a8d5c81467866fd040277aed08ae15fd8ea7c3

zhaog/forestdb,nvoron23/forestdb,couchbase/forestdb,jinxuan/forestdb,yyangpan/forestdb,hisundar/forestdb,nvoron23/forestdb,wurikiji/forestdb,zhaog/forestdb,jinxuan/forestdb,hisundar/forestdb,sushmaad/forestdb,yyangpan/forestdb,seem-sky/forestdb,wurikiji/forestdb,joliss/forestdb,joliss/forestdb,seem-sky/forestdb,sushmaad/forestdb,couchbase/forestdb