Updated openstack/openstack
Project: openstack/nova  4404a05742c54e739ead5f6753caab2c7d0ce004

Split out IO Ops filter unit tests

Break out the unit tests for IO Ops filters from test_host_filters.py
into its own file. In the process, we mock out the database calls for
getting aggregate information instead of creating database records.

Change-Id: I8395ba7c09ca5c85ecd94d2cc670f3cd0880a373