VolumeOpsTestCase class is incorrectly inheriting from HyperVAPITestCase

[Alessandro Pilotti]

The VolumeOpsTestCase class in test_hypervapi.py inherits from HyperVAPITestCase, resulting in all the tests from the base class being executed twice.

The patch that introduced the VolumeOpsTestCase is here:

https://github.com/openstack/nova/commit/d143540ad1b69ec93c2b7bfadd1f654c4d8c7a34

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/73671

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/73671
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=c1a64c94ef848f825e6a36581814511a81945428
Submitter: Jenkins
Branch: master

commit c1a64c94ef848f825e6a36581814511a81945428
Author: Alessandro Pilotti <email address hidden>
Date: Fri Feb 14 19:22:35 2014 +0200

    Fixes the Hyper-V VolumeOpsTestCase base class

    The VolumeOpsTestCase base class inherits incorrectly from
    HyperVAPITestCase, with the unwanted side effect of executing all
    base class tests as well.

    This patch generalizes a common base class from HyperVAPITestCase
    and fixes the inheritance issue.

    Closes-Bug: #1280379

    Change-Id: Ic81beb8397138c16c8d2d88a9c9d05d2b76e0e83