Implement basic docker swarm feature for management service.
This MR implements the sub-ticket #1 (closed), which is part of ticket clevermicro#16 (closed).
This MR implements the basic interaction feature between native Java and Docker Swarm using the docker-java library. The management service only supports swarm mode.
To test locally, first create a local swarm cluster in single node mode: docker swarm init --advertise-addr 127.0.0.1