handle git dependency
venv is should not be set only in case of PFS
only active git proposal is suitable for PFS deployment
check for venv more strictly
Merge pull request #122 from MirantisDellCrowbar/feature/pfs-ui/roxy/master

https://github.com/crowbar/barclamp-keystone/pull/122

Merged by devtool for ArkadyKanevsky