[TEST] randomize byte size and thread count in breaker tests
Packaging: Dont remove ancestors on deb removal

The used -p option could result in accidentally deleting more directories
than /var/lib/elasticsearch - so this option was removed

Note: This only happens if the directories are empty, but still isnt needed.

Relates #5770
Term Vectors API: adds support for wildcards in selected fields

This could useful to generate all term vectors or a chosen set of them.

Closes #7061
[TEST] Rest API: cat.count regexp matchers now explicitely test for newline
Docs: Fix syntax on lang-analyzer

Some of the language analyzer documentation contained invalid json.

Closes #7098
Snapshot checksum verification (First Draft)

Adds automatic verification of all files that are being snapshotted. Closes #5593
Fixup: share indexInput between all parts
Fixup: improve error handling