Update controller and compute declarations

This commit contains all of the changes required
so that the controller and compute declarations
can work with the upstream grizzly modules.

* adds $glance_backend variable
* refactors quantum parameters
* adds configuration for cinder
* adds cinder user and db password variables/config
* adds quantum user and db password variables/config
* adds vm_net_ip to roles. It is the ip address that
is used for vm traffic
Merge pull request #38 from bodepd/upstream_changes

Upstream changes