Unittests added for client v1_1

 Unittests test_client_set_management_url_v1_1 and
 test_client_get_reset_timings_v1_1 added.
 New methods covered:
 * client.set_management_url()
 * client.get_timings()
 * client.reset_timings()

Change-Id: I46cac01864a11fbaffc284d26f63b8e00f2631f0