Updated openstack/openstack
Project: openstack/nova  4b1b06681f9b21eac570368dd43c405728bfdf2b

libvirt: convert test_host.py to use FakeLibvirtFixture

Instead of monkey patching the Host class to use fakelibvirt,
just use the FakeLibvirtFixture. Also create an instance of
the Host class in setUp since every test case needs it.

Blueprint: libvirt-driver-class-refactor
Change-Id: I1d737fc22bc26b686790c06362eb7c61b26bd39d