L2SS-1008: add beamlet source default properties

tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py

@@ -43,6 +43,21 @@ class Beamlet(opcua_device):
     # Device Properties
     # -----------------
 
+    FPGA_beamlet_output_hdr_eth_source_mac_RW_default = device_property(
+        dtype='DevVarStringArray',
+        mandatory=True
+    )
+
+    FPGA_beamlet_output_hdr_ip_source_address_RW_default = device_property(
+        dtype='DevVarStringArray',
+        mandatory=True
+    )
+
+    FPGA_beamlet_output_hdr_udp_source_port_RW_default = device_property(
+        dtype='DevVarUShortArray',
+        mandatory=True
+    )
+
     FPGA_beamlet_output_hdr_eth_destination_mac_RW_default = device_property(
         dtype='DevVarStringArray',
         mandatory=True