Rename Savanna to Sahara

Keep savanna cli before the next client release.

Change-Id: I4c168e2fbda1e78ecc2ed3144937d71342846329
Add V2 Nova API os-quota-sets tests

This patch adds V2 Nova API - os-quota-sets delete tests.

Change-Id: If6f96e6e6d253dbb11cead0ba2aebbb37fa6984e
Merge "Add V2 Nova API os-quota-sets tests"
Merge "Rename Savanna to Sahara"