New simple test for Dialect.has_sequence()
New simple test for Dialect.has_sequence()

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