fixtures: Handle iterable params for 'NeutronFixture.list_*'
fixtures: Handle iterable params for 'NeutronFixture.list_*'

It turns out it's possible to filter on multiple possible values using
by using an iterable query value. We're going to need this for proper
subnet mocking, so add it now. There's no impact on tests.

Change-Id: Ia02ff34ec94a911906e2e812ab6503d4a2118bce
Signed-off-by: Stephen Finucane <492121341a95b3c3aab646bed44634f739dd019b@redhat.com>

mahak/nova,rahulunair/nova,klmitch/nova,openstack/nova,klmitch/nova,rahulunair/nova,rahulunair/nova,klmitch/nova,klmitch/nova,openstack/nova,openstack/nova,mahak/nova,mahak/nova