Add tests for 'AggregateImagePropertiesIsolation'
Add tests for 'AggregateImagePropertiesIsolation'

I was trying to figure out how the various config options for this work.
Add a functional test for this to ensure we don't regress.

Change-Id: I833b1922fcd2d1412c4398a3daeb7630f12d9f8d
Signed-off-by: Stephen Finucane <4725dc7f3632bf126d9fbdc30c347e91e8d2fe16@redhat.com>

openstack/nova,mahak/nova,mahak/nova,openstack/nova,mahak/nova,openstack/nova