Add crossway api for traffic_lights

components/x_way/x_way_server.py

@@ -28,10 +28,18 @@ def get_cars():
     return json_util.dumps({'cursor': cars})
 
 
+@app.route('/api/v1/resources/traffic_lights', methods=['GET'])
+def get_traffic_lights():
 
-@app.route('/api2')
-def api2():
-    return 'api2'
+    try:
+        response = requests.get(ENTITY_IDENT_URL + 'traffic_lights')
+        traffic_lights = response.json()['cursor']
+
+    except requests.exceptions.ConnectionError as e:
+        print("Is the entity_ident_server running and reachable?")
+        raise e
+
+    return json_util.dumps({'cursor': traffic_lights})
 
 
 if __name__ == '__main__':