fix(circle): if branch master, tag is latest (#1869) r=vladikoff
fix(circle): if branch master, tag is latest (#1869) r=vladikoff


eoger/fxa-auth-server,mozilla/fxa-auth-server,eoger/fxa-auth-server,mozilla/fxa-auth-server,mozilla/fxa-auth-server,mozilla/fxa-auth-server,eoger/fxa-auth-server,eoger/fxa-auth-server