…t_settings

Updates source code docs version.

- delete_ip_location_database
- get_ip_location_database
- put_ip_location_database

This reverts commit ce90838.

* index_lifecycle_management.delete_lifecycle - both
* index_lifecycle_management.explain_lifecycle - `master_timeout` only.
* index_lifecycle_management.get_lifecycle - both
* index_lifecycle_management.put_lifecycle - both
* index_lifecycle_management.start - both
* index_lifecycle_management.stop - both
* ingest.delete_geoip_database - both
* ingest.delete_ip_location_database - both
* ingest.put_geoip_database - both
* ingest.put_ip_location_database - both
* snapshot_lifecycle_management.delete_lifecycle - both
* snapshot_lifecycle_management.execute_lifecycle - both
* snapshot_lifecycle_management.execute_retention - both
* snapshot_lifecycle_management.get_lifecycle - both
* snapshot_lifecycle_management.get_stats - both
* snapshot_lifecycle_management.get_status - both
* snapshot_lifecycle_management.put_lifecycle - both

[Time] :master_timeout Explicit operation timeout for connection to master node.
[Time] :timeout Explicit operation timeout.

* open_point_in_time - adds allow_partial_search_results

Fixes #2556

The iteration implementation has been fixed. There was a bug where an
additional search (with scroll) request was made to Elasticsearch for
each resulting hit. It was rewritten so that the docs are retrieved as
needed and the Helper instance doesn't store documents internally,
with big savings in memory and requests to Elasticsearch.