Trivial: Fix a typo in resource.py.
Trivial: Fix a typo in resource.py.

Change-Id: I714b9c5aaebe58e56d18b41f5e4bfcb8873f8694

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