Configure all inter-VM communication to be secure

[leifmadsen]

All communication between VMs needs to be secured. This includes but is not limited to:

• master-slave file transfers
• FileBeat-Logstash data transfer
• Kibana-ElasticSearch communication
• Logstash-ElasticSearch data storage

Relates #93

[redhat-nfvpe]

Configure all inter-VM communication to be secure

[leifmadsen]

There is a new letsencrypt module in Ansible 2.2.0 that we could leverage to make this simpler.

[leifmadsen]

I'm not entirely sure how necessary this issue is now that we're going to be running everything in Docker, and all this traffic will be across a Docker network... something to consider.

[leifmadsen]

I think the way I want to solve this problem is to make inter-container communication inside of Docker, and to then front this with Traefik and LetsEncrypt