remove unnecessary clearScroll call - these contexts are released by delete index now
Aggregations: fix rounding issues on DST switch.

Closes #8339.
Scripts: Return new lists on calls to getValues.

Scripts currently share the same list across invocations to getValues. This
caused a bug in script fields where all documents coming from the same segment
would get the same values (basically, for the next document for which script
values have been requested). Scripts now return a fresh new list on every
invocation to `getValues`.

Close #8576
Added note that ES packages automatically change vm.max_map_count

Closes #8601
Spec: Updated documentation URLs
Docs: Adds documentation for indices.exists_template

Closes: #8657
Update to Jackson 2.4.3

- Update pom to 2.4.3 from 2.4.2
- Enable the CBOR data header (aka tag) from the CBOR Generator to provide binary identification like the Smile format
- Check for the CBOR header and ensure that the data sent in represents a "major type" that is an object
- Cleans up `JsonVsCborTests` unused imports

Conflicts:
	pom.xml
Fix for geohash neighbors when geohash length is even.
We don't have to set XLimit and YLimit depending on the level (even or odd), since semantics of x and y are already swapped on each level.
XLimit is always 7 and YLimit is always 3.

Close #8526
Adding unit test for even / odd boundary condition
Revert "Update to Jackson 2.4.3"

This reverts commit 4c3dd9271fa553d97f68485bcecb3a3a6060260d.
Core: clarify index removal log message
Core: Let the disk threshold decider take into account shards moving away from a node in order to determine if a shard can remain.

By taking this into account we can prevent that we move too many shards away than is necessary.

Closes #8538
Closes #8659