'Ensure we can set an SQL driver if we have had it before.'

def test_same_domain_gets_sql_driver(self):

    new_config = {'identity': {'driver': 'sql'}}
    self.domain_config_api.create_config(CONF.identity.default_domain_id, new_config)
    self.identity_api.domain_configs.get_domain_conf(CONF.identity.default_domain_id)
    new_config = {'identity': {'driver': 'sql'}, 'ldap': {'url': 'fake://memory1'}}
    self.domain_config_api.create_config(CONF.identity.default_domain_id, new_config)
    self.identity_api.domain_configs.get_domain_conf(CONF.identity.default_domain_id)
