Updated openstack/openstack
Project: openstack/nova  b7d02974e0e4ead0fdb2fe9d3e60aa22e1b47093

Separate disk filters out from test_host_filters

Simply moves the disk filters out of the test_host_filters.py file and
into their own test file, removing some copy/paste cruft while we're at
it.

Change-Id: I5c83ac1a9fe6c7b6f4019a29d1a5a5847edf1723