Centralize logging using Fluentd + ES
This is a (pull request #243](https://bitbucket.org/ignitionrobotics/web-cloudsim/pull-requests/243) from bitbucket.
This PR helps configure cloudsim to log to Elasticsearch. The logs will come from our simulation nodes in Kubernetes and also from the web-cloudsim server.
This PR will require the EBS Server to have a ELASTICSEARCH_ADDRESS env var configured.
The web-cloudsim logging configuration will be automatically configured with each pipeline deploy.
The Kubernetes logging configuration must be done by manually installing a Daemonset when configuring the kubernetes cluster.