Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Set version to 2.16.18-SNAPSHOT
  Set version to 2.16.17
  Schema_151: Attempt to add created_on column if it doesn't exist
  Update documentation links of 'numberOfShards' and 'numberOfReplicas'
  Support 'max_result_window' config for Elasticsearch indexes

Change-Id: I62ea02789da59fbca7da586ed7f39e1e4ace152c
tree: c4b04052adbefa192fafee24e057b9006d6fe7be
  1. java/
  2. javatests/