Docs: Update range-query.asciidoc

Closes #8740
[RECOVERY] Make recovery delay configurable

Today we wait 500ms before we retry a recovery if the target node is not ready.
This happens if the source starts the recovery before the target has
processed the clusterstate moving the target shard into the right state.
This can cause a 500ms delay each time it happens while the shard is ready
way earlier on the target node. This commit makes this delay configurable
to mainly speed up test processing and shard allocation in tests.
[RECOVERY] Ensure shards are identical after recovery

Today we don't check if the recovery target has all the
files that we expect there after the recovery. This commit
adds aditional safety to ensure all files are present with the
correct checksums on recovery finalization.

Closes #8723
Fixed forgotten delegation
Removed 1.x version check
Core: Upgrade to lucene-5.0.0-snapshot-1642891.

The only required change was to add a description to our index outputs.

Close #8743
[TEST] speed up tests by reducing the recovery retry by default
Update range-filter.asciidoc

Closes #8741
[TEST] use private randomness in InternalTestCluster