Bug 1151868 - Vagrant: Pin virtualenv to v12.0.7
Bug 1151868 - Vagrant: Pin virtualenv to v12.0.7

Since higher versions include pip 6.1.1, which is currently
incompatible with peep. Virtualenv v12.0.7 ships with pip 6.0.8.

jgraham/treeherder,edmorley/treeherder,adusca/treeherder,glenn124f/treeherder,sylvestre/treeherder,tojon/treeherder,tojon/treeherder,vaishalitekale/treeherder,parkouss/treeherder,jgraham/treeherder,glenn124f/treeherder,sylvestre/treeherder,rail/treeherder,parkouss/treeherder,akhileshpillai/treeherder,akhileshpillai/treeherder,akhileshpillai/treeherder,avih/treeherder,jgraham/treeherder,gbrmachado/treeherder,akhileshpillai/treeherder,moijes12/treeherder,moijes12/treeherder,KWierso/treeherder,tojonmz/treeherder,parkouss/treeherder,adusca/treeherder,wlach/treeherder,avih/treeherder,KWierso/treeherder,rail/treeherder,kapy2010/treeherder,tojonmz/treeherder,vaishalitekale/treeherder,akhileshpillai/treeherder,deathping1994/treeherder,parkouss/treeherder,moijes12/treeherder,vaishalitekale/treeherder,avih/treeherder,tojon/treeherder,vaishalitekale/treeherder,vaishalitekale/treeherder,avih/treeherder,deathping1994/treeherder,gbrmachado/treeherder,parkouss/treeherder,gbrmachado/treeherder,sylvestre/treeherder,deathping1994/treeherder,rail/treeherder,glenn124f/treeherder,tojonmz/treeherder,glenn124f/treeherder,KWierso/treeherder,KWierso/treeherder,deathping1994/treeherder,adusca/treeherder,wlach/treeherder,akhileshpillai/treeherder,adusca/treeherder,kapy2010/treeherder,avih/treeherder,edmorley/treeherder,edmorley/treeherder,rail/treeherder,moijes12/treeherder,adusca/treeherder,gbrmachado/treeherder,wlach/treeherder,glenn124f/treeherder,glenn124f/treeherder,wlach/treeherder,avih/treeherder,wlach/treeherder,sylvestre/treeherder,kapy2010/treeherder,sylvestre/treeherder,moijes12/treeherder,parkouss/treeherder,gbrmachado/treeherder,tojonmz/treeherder,edmorley/treeherder,deathping1994/treeherder,jgraham/treeherder,gbrmachado/treeherder,tojon/treeherder,adusca/treeherder,tojonmz/treeherder,wlach/treeherder,kapy2010/treeherder,tojonmz/treeherder,rail/treeherder,rail/treeherder,kapy2010/treeherder,jgraham/treeherder,vaishalitekale/treeherder,sylvestre/treeherder,jgraham/treeherder,deathping1994/treeherder,moijes12/treeherder