[gauss] Added gauss files

config/gauss_params.yaml

+mqtt:
+  client:
+    protocol: 4      # MQTTv311
+  connection:
+    host: localhost
+    port: 1883
+    keepalive: 60
+  private_path: device/001
+# Commenting the following lines makes the messages to be puclished in the MQTT server as JSON
+# serializer: msgpack:dumps
+# deserializer: msgpack:loads
+bridge:
+  - factory: mqtt_bridge.bridge:RosToMqttBridge
+    msg_type: iri_gnss_msgs.msg:Rpa_positioning_info
+    topic_from: /iri_gnss_data/rpa_positioning_info
+    topic_to: rpa_position

launch/gauss.launch

+<launch>
+  <arg name="use_tls" default="false" />
+  <node name="mqtt_bridge" pkg="mqtt_bridge" type="mqtt_bridge_node.py" output="screen">
+    <rosparam command="delete" param="" />
+    <rosparam command="load" file="$(find mqtt_bridge)/config/gauss_params.yaml" />
+    <rosparam if="$(arg use_tls)" command="load" ns="mqtt" file="$(find mqtt_bridge)/config/tls_params.yaml" />
+  </node>
+</launch>

requirements.txt

 bson>=0.5.2
-inject>=3.3.1
+inject==3.5.4
 paho-mqtt>=1.2
 msgpack-python>=0.4.8