This commit adds throttling statistics to the index stats API and to the recovery state. Closes #10097
The new indices.stats tests have the setup section indented, which can cause problems for some yaml parsers.
Bugs: * "groups" and "types" were being ignored * "completion_fields" as wildcards were not being resolved to fieldnames Enhancements: * Made "groups" and "types" support wildcards * Added missing tests Closes #6390
Boaz Leskes
Zachary Tong
Clinton Gormley