Adds cinder snapshot to the controller node

Snapshot 'cinder_installed' will contain the following packages

    1. cinder-api
    2. cinder-scheduler
    3. lvm2
    4. cinder-volume

This shapshot installs and configures cinder controller and cinder
volume services. Also configures keystone to authenticate with cinder.

This snapshot can be used to obtain stable running version of
controller node and can be used to revert back to this point in case
the students break the cluster.

Change-Id: I0ca7a0b48c455f6ce6c68df5d99bf3edb8a92f84
Merge "Adds cinder snapshot to the controller node"