Fix gitreview config (rename savanna to sahara)

Savanna was renamed to sahara.
http://lists.openstack.org/pipermail/openstack-dev/2014-March/029414.html

Change-Id: I081bdd5d26c466af7d9e917c55edf014fc4377e0
Fixes installing development builds

Changes installing development builds to native resources. Fixed installing
python-pip instead of git package

Closes-Bug: #1294622
Closes-Bug: #1294621

Change-Id: I40bc135c12593bc90742f8cedc33fa2740fef2c9
Merge "Fixes installing development builds"