simulator: replace gpssim with simple orb publication

- this is one of the last pieces of the system that still depend on DriverFramework
 - add new SIM_GPS_NOISE_X parameter for optionally increasing the GPS noise multiplier (was previously a gpssim command line option)
 - add SIM_x_BLOCK parameters to block sensor publication
   - SIM_GPS_BLOCK
   - SIM_ACCEL_BLOCK
   - SIM_GYRO_BLOCK
   - SIM_MAG_BLOCK
   - SIM_BARO_BLOCK
   - SIM_DPRES_BLOCK

posix-configs/SITL/init/test/cmd_template.in

@@ -12,7 +12,6 @@ dataman start
 
 simulator start
 tone_alarm start
-gpssim start
 pwm_out_sim start
 
 ver all

posix-configs/SITL/init/test/test_mavlink

@@ -12,7 +12,6 @@ dataman start
 
 simulator start
 tone_alarm start
-gpssim start
 pwm_out_sim start
 
 ver all

posix-configs/SITL/init/test/test_shutdown

@@ -16,7 +16,6 @@ dataman start
 
 simulator start
 tone_alarm start
-gpssim start
 pwm_out_sim start
 
 rc_update start
@@ -84,7 +83,6 @@ sleep 2
 
 simulator stop
 tone_alarm stop
-gpssim stop
 
 dataman stop
 #uorb stop

posix-configs/SITL/init/test/test_template.in

@@ -12,7 +12,6 @@ dataman start
 
 simulator start
 tone_alarm start
-gpssim start
 pwm_out_sim start
 
 ver all