25cfab8651
When the charm under test is not the self.application_name of the object of the setup/test class zaza.test_charms.test_utils.config_change would try to make a configuration change to the wrong charm. This lead to https://github.com/openstack-charmers/zaza/issues/168. This change allows passing application_name to config_change for when the charm under test is not the same as the object's self.application_name. Closes-Issue: https://github.com/openstack-charmers/zaza/issues/168