Convert test_project to requests_mock
Convert test_project to requests_mock

Convert tests from test_project to requests_mock instead of direct
mock of keystoneclient.

Change-Id: I73fef17367dcaa7d66a3d3d3661775b880225cea

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