tree bbd2928b7c54fd79788e282d68454abe5bed4aea
parent 0e39a8da59f36f2544b5a66f3e02aea61135c740
author David Pursehouse <dpursehouse@collab.net> 1543561641 +0900
committer Marco Miller <marco.miller@ericsson.com> 1543596275 -0500

Allow to set Elasticsearch number of shards and replicas

In the current latest version of Elasticsearch, the number of shards
and replicas are set to 5 and 1 respectively if not explicitly set.

From version 7, the default number of shards will be changed to 1, and
to continue using 5 it must be explicitly set when creating the index.

Explicitly set the values when creating the index, but allow them to be
changed in the gerrit.config. Default the new configurations to 5 and 1
to be consistent with the current defaults.

Bug: Issue 9768
Change-Id: Ia6bc925757f7bf4450d4c8feb21cf838671344f8