fix up closing of dbs after each test
fix up closing of dbs after each test

RAN-II/sqlcipher,RAN-II/sqlcipher,pandazheng/sqlcipher,bestofsong/sqlcipher,hongbinz/sqlcipher,shanshan1026/sqlcipher,shanshan1026/sqlcipher,supriyantomaftuh/sqlcipher,emodeqidao/sqlcipher,bestofsong/sqlcipher,pandazheng/sqlcipher,pandazheng/sqlcipher,emodeqidao/sqlcipher,Mozhuowen/sqlcipher,bestofsong/sqlcipher,RAN-II/sqlcipher,luis-allan/sqlcipher,Mozhuowen/sqlcipher,ylfonline/sqlcipher,cnbin/sqlcipher,hongbinz/sqlcipher,ylfonline/sqlcipher,cnbin/sqlcipher,luis-allan/sqlcipher,hongbinz/sqlcipher,emodeqidao/sqlcipher,shanshan1026/sqlcipher,shanshan1026/sqlcipher,supriyantomaftuh/sqlcipher,luis-allan/sqlcipher,supriyantomaftuh/sqlcipher,cnbin/sqlcipher,ylfonline/sqlcipher,Mozhuowen/sqlcipher