nova fake libvirt library breaking tests

[John Tran]

Nova libvirt fake library was updated to include additional 'virtapi' arg required and our tests do not pass any args to it therefore breaking them. dansmith recommended to change fake.FakeDriver to Fake.FakeVirtAPI which will replicate the old functionality.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/15308

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/15308
Committed: http://github.com/stackforge/ceilometer/commit/415453bfe817aaf2849dbd7b71c33fabde6136fb
Submitter: Jenkins
Branch: master

commit 415453bfe817aaf2849dbd7b71c33fabde6136fb
Author: John Tran <email address hidden>
Date: Fri Nov 2 20:52:18 2012 +0000

    nova fake libvirt library breaking tests

    fixes bug #1074488 Nova libvirt fake library
    was updated to include additional 'virtapi' arg
    required and our tests do not pass any args to
    it therefore breaking them. dansmith recommended
    to change fake.FakeDriver to Fake.FakeVirtAPI
    which will replicate the old functionality.

    Change-Id: Iedcd32cd038c6043d782565312adf5fcba8d9b7a