Log Message:
Update databases/elasticsearch to 2.3.5.

2.3.5

There are no changes in Elasticsearch 2.3.5 except for the version
bump. This is a compatibility release for bug fixes in Marvel,
Watcher, and Shield.

2.3.4

Bulk
- Copy headers and context to individual requests inside a bulk

CAT API
- Fix merge stats rendering in RestIndicesAction
- Expand wildcards to closed indices in /_cat/indices

Cluster
- Fix block checks when no indices are specified

Core
- Fix misplaced cast when parsing seconds

Highlighting
- Skip all geo point queries in plain highlighter

Internal
- Fix filtering of node ids for TransportNodesAction

Percolator
- Fixed NPE when percolator filter option is "empty".

REST
- Do not decode path when sending error

Translog
- Translog can delete valid .ckp file when views are closed after
  the translog

- Dates
Upgrade joda-time to 2.9.4