[TEST] Enforce that only one shard per node is allocated. The prevents during node shutdown, that a second shard is assigned the another node.
mute this test until we fix isFinite
[TEST] Temporarily added a wait-for-yellow to delete_mapping tests

Should be removed once #5997 is fixed
Provided some insights as to how More Like This works internally.

In the Google Groups forum there appears to be some confusion as to what mlt
does. This documentation update should hopefully help demystifying this
feature, and provide some understanding as to how to use its parameters.

Closes #6092
Added the ability to include the queried document for More Like This API.

By default More Like This API excludes the queried document from the response.
However, when debugging or when comparing scores across different queries, it
could be useful to have the best possible matched hit. So this option lets users
explicitly specify the desired behavior.

Closes #6067
Add /_cat/fielddata to display fielddata usage

Closes #4593