L2SS-244: Cannot have both mandatory=True and default_value

devices/SST.py

@@ -38,8 +38,7 @@ class SST(hardware_device):
 
     SST_Port = device_property(
         dtype='DevUShort',
-        mandatory=True,
-        default_value=5001
+        mandatory=True
     )
 
     # ----------