Stop mocking method in fwaas test
Stop mocking method in fwaas test

Found this while debugging the previous patch. Improve the unit
test by not mocking the method but instead doing an additional
requests_mock call.

Change-Id: Ifbb5b57d2dbf501ad17ceacc4ee6237a1d21851e

stackforge/python-openstacksdk,openstack/python-openstacksdk,stackforge/python-openstacksdk,dtroyer/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk