Upgrade to Netty 3.9.3.Final
closes #7328
Upgrade to Jackson Smile 2.4.1.1
This fixes issue 18 in Smile (https://github.com/FasterXML/jackson-dataformat-smile/issues/18)

closes #7327
Fix NPE in SnapshotsService on node shutdown

Fixes #6506
Snapshot checksum verification

Adds automatic verification of all files that are being snapshotted. Closes #5593
Test: Prevent use of transport client when testing changed transports

This makes sure, that the transport client is not used, as it would use
a different than the configured local transport mechanism in this test.
bool query: parser should return match_all in case there are no clauses

This also fixes has_parent filters with a nested empty bool filter
(see test SimpleChildQuerySearchTests#test6722, the test should actually expect
either 0 results when searching for has_parent "test" or one result when
search for has_parent "foo")

closes #7240