Setup Deployment flow for LibreCores CI

[oleg-nenashev]

Once #47 is done, we may create an automated job which builds and deploys LibreCores CI WAR on the ci.librecores.org

Acceptance Criteria:

• There is an external or internal flow which interacts with ci.librecores.org and deploys new WAR/Docker versions there
• Flow:
  • Configuration Management tool takes a new build from a flow in Add support of packaging LibreCores CI as a WAR/Docker file using Custom WAR Packager #47
  • Make a backup of the instance
  • Replace the configuration by a new one
  • Restart the instance
  • Verify that Jenkins starts up, rollback otherwise

Implementation could be similar to https://github.com/librecores/librecores-web:

• Ansible scripts/definitions to manage the deployment

An alternative would be to move ci.librecores.org into a Docker container and to manage it using Docker and DockerCompose/Kubernetes features. Kubernetes would be preferable