Adds the GET overall_buckets API.
The REST end point is: GET
/_xpack/ml/anomaly_detectors/job_id/results/overall_buckets
The API returns overall bucket results. An overall bucket
is a summarized bucket result over multiple jobs.
It has the `bucket_span` of the longest job's `bucket_span`.
It also has an `overall_score` that is the `top_n` average of the
max anomaly scores per job.
relates elastic/x-pack-elasticsearch#2693
Original commit: elastic/x-pack-elasticsearch@ba6061482d
* [DOCS] Update ML APIs for Elasticsearch Reference
* [DOCS] Add X-Pack icon for ML APIs
* [DOCS] Add role attribute to ML APIs
Original commit: elastic/x-pack-elasticsearch@997ea39759
* [DOCS] Add ML categorization of messages
* [DOCS] Describe ML categorization_examples_limit property
* [DOCS] Updated ML categorization of messages
* [DOCS] Add links to ML categorization
Original commit: elastic/x-pack-elasticsearch@6403f6ce84
* Remove sequenceNum from anomaly records and influencers
* Generate unqiue IDs without sequence numbers
* Remove more instances of sequence_num
* Handle parsing sequnce_num from v5.4
Original commit: elastic/x-pack-elasticsearch@e60b206daf
* [DOCS] Edits for description of ML results resource
* [DOCS] Adds Authorization section to ML API pages
Original commit: elastic/x-pack-elasticsearch@797761e7ae