noauth: simplify class reference
noauth: simplify class reference

Change-Id: I1d3c0b2d6ff715559036ea9e6f6caf90064663de

openstack/python-aodhclient,sileht/python-gnocchiclient,gnocchixyz/python-gnocchiclient,chungg/python-aodhclient,chungg/python-aodhclient,gnocchixyz/python-gnocchiclient