hide option "Use virtualenv" if he not supported for current barclamp
Merge pull request #8 from crowbar/release/pebbles/master

Release/pebbles/master
Merge branch 'release/pebbles/master' into bug/DCB-93/pebbles/master
Merge pull request #19 from MirantisDellCrowbar/bug/DCB-93/pebbles/master

https://github.com/crowbar/barclamp-git/pull/19

Merged by devtool for VictorLowther