Airspeed check: updated message and explained test parameters

src/modules/commander/commander_tests/state_machine_helper_test.cpp

@@ -296,7 +296,10 @@ bool StateMachineHelperTest::armingStateTransitionTest(void)
 				false /* no pre-arm checks */,
 				nullptr /* no mavlink_log_pub */,
 				&status_flags,
-				5.0f, check_gps, 2e6);
+				5.0f, /* avionics rail voltage */
+                check_gps,
+                2e6 /* 2 seconds after boot, everything should be checked */
+                );
 
         // Validate result of transition
         ut_compare(test->assertMsg, test->expected_transition_result, result);