Logger: Run at lower priority than core control pipeline

This should ensure that controllers run first and log data copying happens after.
;

src/modules/logger/logger.cpp

@@ -211,7 +211,7 @@ int Logger::start(char *const *argv)
 	/* start the task */
 	logger_task = px4_task_spawn_cmd("logger",
 					 SCHED_DEFAULT,
-					 SCHED_PRIORITY_MAX - 5,
+					 SCHED_PRIORITY_MAX - 10,
 					 3600,
 					 (px4_main_t)&Logger::run_trampoline,
 					 (char *const *)argv);