This commit removes the usages and definition of deprecated methods that do not accept the XContentType for the source.
Additionally, usages of *Entity classes from the http client library have been changed to always specify the content
type.
Original commit: elastic/x-pack-elasticsearch@29d336a008
This change adds licensing to the maching learning feature, and only allows access to machine learning if a trial or platinum license is installed.
Further, this change also renames `MlPlugin` to `MachineLearning` in line with the other feature plugin names and move the enabled setting to `XPackSettings`
Original commit: elastic/x-pack-elasticsearch@48ea9d781b
Colin Goodheart-Smithe
Dimitris Athanasiou
Ryan Ernst
Jay Modi