check_once_cc_get_change_time
err = check_once_cc_get_change_time(context, NULL, CC_BAD_PARM, "NULL param, should fail");
check_once_cc_get_change_time(context, &last_change_time, CC_NOERROR, "first-run, should be > 0");
check_once_cc_get_change_time(context, &last_change_time, CC_NOERROR, "after creating a new ccache");
check_once_cc_get_change_time(context, &last_change_time, CC_NOERROR, "after changing a principle");
check_once_cc_get_change_time(context, &last_change_time, CC_NOERROR, "after storing a credential");
check_once_cc_get_change_time(context, &last_change_time, CC_NOERROR, "after removing a credential");
check_once_cc_get_change_time(context, &last_change_time, CC_NOERROR, "after destroying a ccache");
cc_int32 check_once_cc_get_change_time(apiCB *context, cc_time_t *time, cc_result expected_err, const char *description);