[ML] Overall swimlane and job swimlane should query same data

[elasticmachine]

Original comment by @sophiec20:

Found in {"build":{"hash":"b02dfdf","date":"2017-04-24T13:33:22.536Z"}

The Overall swimlane is the max(anomaly_score) where result_type is bucket_influencer.

The Job swimlane is the anomaly_score where result_type is bucket.

These values should be identical, because the bucket anomaly_score is calculated to be the max(bucket_influencer anomaly_score).

It seems wise that the overall swimlane should query the same results as the job_id swimlanes.

Perhaps this should be max(bucket_influencer anomaly_score) as this will allow us to filter by influencer type, at some point in the future. e.g. Show me the most unusual client_ips..

Requires further investigation.