glusterfs driver doesn't report volume stats

[Eric Harney]

The glusterfs driver doesn't implement the get_volume_stats function. This means that volume creation will fail at the scheduler with the following:

2013-04-03 10:58:37 ERROR [cinder.scheduler.filters.capacity_filter] Free capacity not set: volume node info collection broken.
2013-04-03 10:58:37 ERROR [cinder.scheduler.manager] Failed to schedule_create_volume: No valid host was found.

Need to add this functionality to the driver.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/26034
Committed: http://github.com/openstack/cinder/commit/d59094f316f0c41aaa7be63ee4e25e2dea4fa0a9
Submitter: Jenkins
Branch: master

commit d59094f316f0c41aaa7be63ee4e25e2dea4fa0a9
Author: Eric Harney <email address hidden>
Date: Wed Apr 3 14:39:38 2013 -0400

    Implement get_volume_stats for GlusterFS driver

    Implement get_volume_stats(), so that the GlusterFS driver
    will work correctly with the scheduler.

    Fixes bug: 1164038

    Change-Id: Ib4db8bad897212227b39704e2e6cb5f07f2bb70e

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/grizzly
Review: https://review.openstack.org/26377

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/26377
Committed: http://github.com/openstack/cinder/commit/b8de829a885d8b48a2794b4607eb5f70b8a3d4e9
Submitter: Jenkins
Branch: stable/grizzly

commit b8de829a885d8b48a2794b4607eb5f70b8a3d4e9
Author: Eric Harney <email address hidden>
Date: Wed Apr 3 14:39:38 2013 -0400

    Implement get_volume_stats for GlusterFS driver

    Implement get_volume_stats(), so that the GlusterFS driver
    will work correctly with the scheduler.

    Fixes bug: 1164038

    Change-Id: Ib4db8bad897212227b39704e2e6cb5f07f2bb70e
    (cherry picked from commit d59094f316f0c41aaa7be63ee4e25e2dea4fa0a9)