This PR standardizes the testing around the central tests repository:
* Removes the install-cinder and prepare-vg playbooks
* Moves the inventory settings into host_vars
* Adjusts the "bridges" settings
* Standardize IP addresses on the 10.1.1.0/24 range
Change-Id: I91c8079b033bb83e0175a3ab4b1c020a8df4a0db
Depends-On: Ibe2bcd91af9eac099e86e92f9294ed04fffe7b95
660c5b8bae