Perform reindex operation for all indexes on init for elasticsearch
index. This change allows for starting an elasticsearch index with only
the init command, similar to a Lucene index.
Remove reindex operation on ElasticReindexIT, since with this change
performing a reindex manually is no longer needed.
Test plan: Run InitIT, ElasticReindexIT and ReindexIT.
This change is Index type agnostic and affects both Lucene and
Elasticsearch. If any of these index types used by a Gerrit instance do
not "exist", they will be reindexed. However, it is mostly focused
towards Elasticsearch which usually requires a manual reindex before
initializing a Gerrit site.
Bug: Issue 12909
Feature: Issue 12704
Change-Id: If7741771e25a6063c5116ab2bce39fbe0e0ea93b
(cherry-picked from 00cc7a985e)
8d18e906ba