Remove some dead code.
[TEST] Wait for threads to finish / start before asserting
Update setup.asciidoc

Add a note about using the same JVM version on all nodes and clients
Fix TransportNodesListShardStoreMetaData for custom data paths

Cleans up the testReusePeerRecovery test as well

The actual fix is in TransportNodesListShardStoreMetaData.java, which
needs to use `nodeEnv.shardDataPaths` instead of `nodeEnv.shardPaths`.

Due to the difficulty in tracking this down, I've added a lot of
additional logging. This also fixes a logging issue in GatewayAllocator
[GEO] GIS envelope validation

ShapeBuilder expected coordinates for Envelope types in strict Top-Left, Bottom-Right order. Given that GeoJSON does not enforce coordinate order (as seen in #8672) clients could specify envelope bounds in any order and be compliant with the GeoJSON spec but not the ES ShapeBuilder logic. This change loosens the ShapeBuilder requirements on envelope coordinate order, reordering where necessary.

closes #2544
closes #9067
closes #9079
closes #9080
Docs: The regexp query defaults to the `ALL` flag, and removed
the `AUTOMATON` flag which is not used in Elasticsearch.

Closes #6180
Scripting: Make _score in groovy scripts comparable

closes #8828
closes #9094