Don't add +simple to pypi_mirror (#2129)
Don't add +simple to pypi_mirror (#2129)

The +simple extension is something typically added by devpi, though it
exists on pypi.python.org. For some envrionments like the upstream
openstack pypi mirror and the portbleu mirror we don't have the +simple
path. The +simple path isn't required, if ommited it will correctly
lookup the path and enable the non +simple use case.
lihkin213/ursula,channus/ursula,lihkin213/ursula,nirajdp76/ursula,lihkin213/ursula,panxia6679/ursula,ddaskal/ursula,pgraziano/ursula,channus/ursula,ddaskal/ursula,knandya/ursula,channus/ursula,pgraziano/ursula,edtubillara/ursula,lihkin213/ursula,panxia6679/ursula,rongzhus/ursula,twaldrop/ursula,fancyhe/ursula,ddaskal/ursula,panxia6679/ursula,rongzhus/ursula,narengan/ursula,zrs233/ursula,wupeiran/ursula,zrs233/ursula,narengan/ursula,twaldrop/ursula,knandya/ursula,blueboxgroup/ursula,nirajdp76/ursula,twaldrop/ursula,fancyhe/ursula,nirajdp76/ursula,edtubillara/ursula,zrs233/ursula,narengan/ursula,knandya/ursula,narengan/ursula,nirajdp76/ursula,wupeiran/ursula,zrs233/ursula,fancyhe/ursula,ddaskal/ursula,edtubillara/ursula,edtubillara/ursula,wupeiran/ursula,knandya/ursula,blueboxgroup/ursula,wupeiran/ursula,blueboxgroup/ursula,twaldrop/ursula,rongzhus/ursula,panxia6679/ursula,fancyhe/ursula,rongzhus/ursula,channus/ursula,blueboxgroup/ursula,pgraziano/ursula,pgraziano/ursula