Tianli Feng 3da9eb642c
Add a new REST API endpoint 'GET _cat/cluster_manager' as the replacement of 'GET _cat/master' (#2404)
* Add a new path `/_cat/cluster_manager` for the REST request handler `RestMasterAction`
* Deprecate the existing path `/_cat/master`
* Change the name of the `RestMasterAction` handler from `cat_master_action` to `cat_cluster_manager_action`
* Change the response of `GET _cat` to only show the new path `/_cat/cluster_manager`
* Rename the JSON rest-api-spec file `cat.master.json` to `cat.cluster_manager.json` and update the paths.
* Add YAML REST test. By default, it will run test for both endpoints `GET _cat/cluster_manager` and `GET _cat/master`

Signed-off-by: Tianli Feng <ftianli@amazon.com>
2022-03-18 15:00:23 -07:00
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