cinder test utils is_installed doesn't work

[John Griffith]

The check for cinder is installed (cinder.tests.utils:is_cinder_installed()) is bogus. It will always return False and as a result cause the unit tests for the scheduler to always be skipped.

The reason is that the path and the designation for cinder.egg-info is wrong. Easily fixed here: https://gist.github.com/j-griffith/6252944

However this reveals that one of the unit tests is failing and needs fixed.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/42413

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/41888
Committed: http://github.com/openstack/cinder/commit/998bee4a5da75a9eb39b6d3bdc6a96791fb6d8aa
Submitter: Jenkins
Branch: master

commit 998bee4a5da75a9eb39b6d3bdc6a96791fb6d8aa
Author: Michael Kerrin <email address hidden>
Date: Wed Aug 14 10:16:42 2013 +0000

    Re-enable a lot of cinder scheduler tests

    This highlight and fixes a NoneType exception in the schedulers
    _get_weighted_candidates method

    This was originally added to get around the fact that the filter tests
    required that cinder was correctly installed on the system. But the
    is_cinder_installed condition always returning False and this hid
    problems of old packages been installed in our system. Also
    930f5891b0815e1b49b9b2cc840e0c24b2796e84 added the setup.py automatically
    to run_tests.sh so we can remove this.

    See https://review.openstack.org/#/c/20213/ for history.

    Fixes bug: 1213226

    Change-Id: I86fee802c0543355471ddbd712e52ccec750cea0