fix(nodes, launch): Fixes two Mock GPS node related bugs

1. Fixes inverted px4_micrortps flag in mock GPS node PX4 launch configuration.

2. Fixes typo in mock GPS node source code.

[skip ci]

Author: hmakelin

gisnav/nodes/mock_gps_node.py

@@ -123,7 +123,7 @@ def _publish(self, lat, lon, altitude_amsl, altitude_ellipsoid, heading, timesta
             else:
                 assert_type(msg, dict)
                 assert self._mock_gps_pub is None
-                self._socket.sendto(f'{json.dumps(msg)}'.encode('utf-8'), (self._udp_ip, self._upd_port))
+                self._socket.sendto(f'{json.dumps(msg)}'.encode('utf-8'), (self._udp_ip, self._udp_port))
         else:
             self.get_logger().info('Could not create GPS message, skipping publishing.')
 

launch/params/mock_gps_node_px4.yaml

@@ -1,3 +1,3 @@
 mock_gps_node:
   ros__parameters:
-    px4_micrortps: False  # Set to False for ArduPilot MAVROS
+    px4_micrortps: True  # Set to False for ArduPilot MAVROS