Trivial-Fix : Add a ' to the choices documentation
Trivial-Fix : Add a ' to the choices documentation

Change-Id: Ic2023e91602fa23512bc5cc9c6a395f2311adb1a

redhat-openstack/python-openstackclient,openstack/python-openstackclient,openstack/python-openstackclient,dtroyer/python-openstackclient,redhat-openstack/python-openstackclient,dtroyer/python-openstackclient