Jenkins HIL test fix sensor timeouts

- stop logger when running tests
 - decrease test priorities
 - hrt test don't flush output

src/systemcmds/tests/hrt_test/hrt_test_start.cpp

@@ -66,7 +66,7 @@ int hrt_test_main(int argc, char *argv[])
 
 		daemon_task = px4_task_spawn_cmd("hrttest",
 						 SCHED_DEFAULT,
-						 SCHED_PRIORITY_MAX - 5,
+						 SCHED_PRIORITY_DEFAULT,
 						 2000,
 						 PX4_MAIN,
 						 (argv) ? (char *const *)&argv[2] : (char *const *)nullptr);