Fix trove guest confing to ignore user os_admin

This value of ignore_users in the guest config needs to be set
correctly to ignore the local os_admin user for the trove functional
tests to pass in a devstack-gate environment.

Change-Id: Ia31dfe8f2eab4b24790b6be0dbc474cf50f39afa
Implement Ceph backend for Glance / Cinder / Nova

The new lib installs a full Ceph cluster. It can be managed
by the service init scripts. Ceph can also be installed in
standalone without any other components.
This implementation adds the auto-configuration for
the following services with Ceph:

* Glance
* Cinder
* Cinder backup
* Nova

To enable Ceph simply add: ENABLED_SERVICES+=,ceph to your localrc.
If you want to play with the Ceph replication, you can use the
CEPH_REPLICAS option and set a replica. This replica will be used for
every pools (Glance, Cinder, Cinder backup and Nova). The size of the
loopback disk used for Ceph can also be managed thanks to the
CEPH_LOOPBACK_DISK_SIZE option.

Going further pools, users and PGs are configurable as well. The
convention is <SERVICE_NAME_IN_CAPITAL>_CEPH_<OPTION> where services are
GLANCE, CINDER, NOVA, CINDER_BAK. Let's take the example of Cinder:

* CINDER_CEPH_POOL
* CINDER_CEPH_USER
* CINDER_CEPH_POOL_PG
* CINDER_CEPH_POOL_PGP

** Only works on Ubuntu Trusty, Fedora 19/20 or later **

Change-Id: Ifec850ba8e1e5263234ef428669150c76cfdb6ad
Implements: blueprint implement-ceph-backend
Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Use Q_PORT variable rather than hardcoded port

Change-Id: I647c6bdf14f2551bd120821a16044cec2b03b197
closes-bug: 1348834
Merge "Fix trove guest confing to ignore user os_admin"
Merge "Use Q_PORT variable rather than hardcoded port"
Merge "Implement Ceph backend for Glance / Cinder / Nova"