create new multicopter rate controller module (mc_rate_control) split out of mc_att_control

src/systemcmds/esc_calib/esc_calib.c

@@ -73,7 +73,7 @@ usage(const char *reason)
 				 "\n"
 				 "Calibration procedure (running the command will guide you through it):\n"
 				 "- Remove props, power off the ESC's\n"
-				 "- Stop attitude controllers: mc_att_control stop, fw_att_control stop\n"
+				 "- Stop attitude and rate controllers: mc_rate_control stop, fw_att_control stop\n"
 				 "- Make sure safety is off\n"
 				 "- Run this command\n"
 				);
@@ -218,7 +218,7 @@ esc_calib_main(int argc, char *argv[])
 
 	if (orb_updated) {
 		PX4_ERR("ABORTING! Attitude control still active. Please ensure to shut down all controllers:\n"
-			"\tmc_att_control stop\n"
+			"\tmc_rate_control stop\n"
 			"\tfw_att_control stop\n");
 		return 1;
 	}

src/systemcmds/motor_ramp/motor_ramp.cpp

@@ -120,7 +120,7 @@ usage(const char *reason)
 Application to test motor ramp up.
 
 Before starting, make sure to stop any running attitude controller:
-$ mc_att_control stop
+$ mc_rate_control stop
 $ fw_att_control stop
 
 When starting, a background task is started, runs for several seconds (as specified), then exits.
@@ -327,7 +327,7 @@ int prepare(int fd, unsigned long *max_channels)
 
 	if (orb_updated) {
 		PX4_ERR("ABORTING! Attitude control still active. Please ensure to shut down all controllers:\n"
-			"\tmc_att_control stop\n"
+			"\tmc_rate_control stop\n"
 			"\tfw_att_control stop\n");
 		return 1;
 	}