Update() lowered MTU for compatibility to docker running on openstack VMs

docker-compose.yml

@@ -213,9 +213,14 @@ services:
 
 networks:
   default:
+    driver: bridge
+    driver_opts:
+      com.docker.network.driver.mtu: 1450
+      com.docker.network.bridge.name: sig-network
     ipam:
       config:
         - subnet: 172.18.1.0/24
+
 volumes:
   mysql-db: ~
   mongo-db: ~