Add perf_free() calls orb_unsubscribe and remove delete _instance in the Simulator class destructor.
Add perf_free() calls orb_unsubscribe and remove delete _instance in the Simulator class destructor.

dagar/Firmware,PX4/Firmware,dagar/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,krbeverx/Firmware,acfloria/Firmware,PX4/Firmware,acfloria/Firmware,acfloria/Firmware,dagar/Firmware,dagar/Firmware,PX4/Firmware,PX4/Firmware,krbeverx/Firmware,acfloria/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,dagar/Firmware,krbeverx/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,dagar/Firmware,dagar/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware