Jay Modi 3600c9862f
Reintroduce system index APIs for Kibana ()
This change reintroduces the system index APIs for Kibana without the
changes made for marking what system indices could be accessed using
these APIs. In essence, this is a partial revert of . The changes
for marking what system indices should be allowed access will be
handled in a separate change.

The APIs introduced here are wrapped versions of the existing REST
endpoints. A new setting is also introduced since the Kibana system
indices' names are allowed to be changed by a user in case multiple
instances of Kibana use the same instance of Elasticsearch.

Relates 
Backport of 
2020-04-08 09:08:49 -06:00
..