Migrate flavor usage in test_create_server to request_mock
Migrate flavor usage in test_create_server to request_mock

Don't fix the whole tests, since it does a bunch of neutron
introspection. Also, make sure it doesn't call neutron yet. We'll get to
that when we migrate neutron calls.

Change-Id: I9faaecedb6c888119e0c1370e9c6ca1a2f6a2fb8

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