Fixes issue #51 "peer2_cli" service fails to start sometimes, as it starts before peer2 service is ready

[anandhakumarpalanisamy]

fixes issue #51 "peer2_cli" service fails to start sometimes, as it starts before peer2 service is ready

• modified restart_policy of all "_cli" services from "none" to "on-failure".
• Now the "_cli" services will be restarted until they are successfully completed for the first time.
• Elegant way is to use "depends_on" option in docker compose which will wait for the dependent service.
• But the "depends_on" feature is not supported in ansible's community.general.docker_swarm_service
• The restart_policy: "on-failure" does the trick.