L2SS-1006: Move Antenna_Type as a property of AntennaField instead of SDP

tangostationcontrol/tangostationcontrol/devices/antennafield.py

@@ -480,6 +480,9 @@ class AntennaField(lofar_device):
         # Turn on power to antennas that need it (and due to the ANT_mask, that we're using)
         self.proxy.write_attribute('RCU_PWR_ANT_on_RW', self.Antenna_Needs_Power)
 
+    # --------
+    # Commands
+    # --------
     @command()
     def configure_sdp(self):
         """ Configure SDP to process our antennas. """