microdds_client: add namespace to partecipant name

The partecipant name is modified into
"client_namespace"/px4_micro_xrce_dds

For sitl builds the microdds_client is automatically started
with namespace
px4_"instance_number"
and udp port
8888+"intance_number"

Signed-off-by: Beniamino Pozzan <beniamino.pozzan@phd.unipd.it>

ROMFS/px4fmu_common/init.d-posix/rcS

@@ -260,7 +260,7 @@ fi
 navigator start
 
 # Try to start the microdds_client with UDP transport if module exists
-microdds_client start -t udp -p 8888
+microdds_client start -t udp -p "$((px4_instance+8888))" -n "px4_${px4_instance}"
 
 if param greater -s MNT_MODE_IN -1
 then