(maint) Make puppet/facter branches used in acceptance configurable
(maint) Make puppet/facter branches used in acceptance configurable

Note 25c5462cd5a80ceca77c5bee35b23901099df763 made this change in hiera#stable
however it wasn't easily mergeable from stable -> master because of acceptance
changes done on master. So I did a 'git merge -s ours stable' previously,
and simply reimplemented the one-line change here.

ferventcoder/hiera,MikaelSmith/hiera,Iristyle/hiera,ferventcoder/hiera,Iristyle/hiera,Iristyle/hiera,johnduarte/hiera,MikaelSmith/hiera,MikaelSmith/hiera,johnduarte/hiera,johnduarte/hiera,ferventcoder/hiera