restored sequence back, needed by PG for the unit test
restored sequence back, needed by PG for the unit test

Akrog/sqlalchemy,276361270/sqlalchemy,wfxiang08/sqlalchemy,alex/sqlalchemy,ThiefMaster/sqlalchemy,inspirehep/sqlalchemy,Cito/sqlalchemy,robin900/sqlalchemy,dstufft/sqlalchemy,bootandy/sqlalchemy,dstufft/sqlalchemy,halfcrazy/sqlalchemy,EvaSDK/sqlalchemy,ThiefMaster/sqlalchemy,epa/sqlalchemy,WinterNis/sqlalchemy,wujuguang/sqlalchemy,j5int/sqlalchemy,pdufour/sqlalchemy,bootandy/sqlalchemy,graingert/sqlalchemy,alex/sqlalchemy,WinterNis/sqlalchemy,wfxiang08/sqlalchemy,davidjb/sqlalchemy,hsum/sqlalchemy,bdupharm/sqlalchemy,pdufour/sqlalchemy,davidjb/sqlalchemy,Akrog/sqlalchemy,wujuguang/sqlalchemy,bdupharm/sqlalchemy,davidfraser/sqlalchemy,olemis/sqlalchemy,Cito/sqlalchemy,elelianghh/sqlalchemy,sandan/sqlalchemy,alex/sqlalchemy,sandan/sqlalchemy,itkovian/sqlalchemy,epa/sqlalchemy,brianv0/sqlalchemy,276361270/sqlalchemy,olemis/sqlalchemy,halfcrazy/sqlalchemy,elelianghh/sqlalchemy,itkovian/sqlalchemy,zzzeek/sqlalchemy,inspirehep/sqlalchemy,Cito/sqlalchemy,monetate/sqlalchemy,robin900/sqlalchemy,brianv0/sqlalchemy,hsum/sqlalchemy,j5int/sqlalchemy,monetate/sqlalchemy,EvaSDK/sqlalchemy,sqlalchemy/sqlalchemy,graingert/sqlalchemy,davidfraser/sqlalchemy