cinder test_volume fails intermittently on volume_get

[John Griffith]

cinder.tests.test_volume.VolumeTestCase.test_detach_invalid_attachment_id fails intermittently because it's relying on a fake that isn't explicitly set up.

Failure happens occasionally and looks like this:
http://logs.openstack.org/77/175077/2/check/gate-cinder-python27/bf872b6/console.html

Should have a dedicated mock of db.volume_get that returns the fake volume in the test.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/175167

[OpenStack Infra (hudson-openstack)]

Change abandoned by John Griffith (<email address hidden>) on branch: master
Review: https://review.openstack.org/175167
Reason: Folding this into the update that caused it.

[John Griffith (john-griffith)]

This actually was introduced by the work I was doing on logging, that introduced a db.get call.