fix metadata import
fix metadata import

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