Backport 2412 to 8.13 (#2420)

* Batch from java issues (#2412)

* added 'remove_binary' to AttachmentProcessor (issue #727)

* making node info path optional (issue #242)

* making node info discover seed_host optional (issue #242)

* changed description for update by query  (issue #315)

* adding custom options to index settings similarity (issue #299)

* initial_master_nodes from string to string[] (issue #242)

* correct contrib

* correct node info discover class (issue #242)

* contrib