Update clearcache.asciidoc

Changed `field_data` to `fielddata` to be consistent with the indices stats output

Closes #2888
vary offset/length (i hope) in compressed stream test
Test: make sure mappings are on all shards to prevent false test failures
Suggester: add suggestRequest to Requests and fix broken javadocs in client

closes #7206
Internal: removed needless serialization code from TransportIndexReplicationAction and corresponding request object

TransportIndexReplicationAction is always executed locally, as an internal action that is part of either delete by query or delete (when routing is required but not specified). Only the corresponding shard level requests get sent over the transport, hence no transport endpoint is needed for the index version, nor the index request itself is supposed to be sent over the transport.

Moved classes from org.elasticsearch.action.delete.index to org.elasticsearch.action.delete and adjusted visibility so that internal requests are not public anymore.

Also removed serialization code from IndexDeleteResponse as it never gets sent over transport either.