Build: Enable Metrics Portal Reporting

[vjkoskela]

This requires at least:

1. Standing up a Postgresql instance via docker.
2. Configuring Metrics Portal for Akka clustering; although not necessarily having more than one host.
3. Configuring Metrics Portal to enable reporting.
4. Installing the reporting widget (plugin) automatically into Grafana.
5. Including and uploading a JSON definition of an example report.

[vjkoskela]

This will probably solve #4 also; although the cluster state can be backed either into Cassandra (used by CAGG + KDB) or into PG (which is required anyway for reporting). I don't think for build/demo purposes it really matters.