a mistake in tests/identity/v3/test_role.py
a mistake in tests/identity/v3/test_role.py

Change test_service_show to test_role_show.

Change-Id: Ieef7fdeb9401b4dc28720c9ba14bf460ac171288

dtroyer/python-openstackclient,redhat-openstack/python-openstackclient,varunarya10/python-openstackclient,openstack/python-openstackclient,BjoernT/python-openstackclient,dtroyer/python-openstackclient,varunarya10/python-openstackclient,redhat-openstack/python-openstackclient,BjoernT/python-openstackclient,openstack/python-openstackclient