Update health checks etc to use the Stackable environment

[MattBlissett]

The dev2/uat2 configuration refers to Oozie and YARN, which won't exist in the new cluster.

[MortenHofft]

Perhaps this is a perfect occasion to remove the health checks from portal16? to use some other API?
Either way, when is this due?

[MattBlissett]

With admin authentication, https://api.gbif.org/v1/occurrence/download?status=PREPARING&status=RUNNING gives the number of running downloads.

For 'ingestion' I think add the sum of the counts of http://api.gbif.org/v1/dataset/process/running and https://api.gbif.org/v1/pipelines/history/process/running

That can apply in current prod too, and the config needing Oozie and YARN removed.

[MortenHofft]

Ingestion counts have been updated, but download counts is blocked by gbif/registry#588