Make Tempest much more amenable to being run without using PFS. [1/2]

Allow Tempest to work with OS native packages, once Ubuntu gets all
the packages it needs up to the proper revisions.

In the mean time, default to using PFS for Tempest.


 chef/cookbooks/git/recipes/config.rb |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

Crowbar-Pull-ID: 8f21319d8693626bd2e77f301f9477dda04f0118

Crowbar-Release: pebbles