The execution state is kind of a global indicator if a watch has been
running successfully and is used by the watcher UI.
However this field is only stored in the watch history but not part of
the watch status, thus it is not available everywhere. In order to
simplify the watcher UI this commit also adds the field to the
watch status which is stored together with the watch.
It is stored under the `status.execution_state` field as `status.state`
is already taken. This is also reflects with the name of the java class.
The WatchStatus class does not contain serialization checks, as this is
intended to be backported to 6.x, where those checks will be added.
Once the backport is done, the old execution state field can be fully
deleted from the master branch in another commit (syncing with Kibana
folks required).
relates elastic/x-pack-elasticsearch#2385
* fix doc tests
Original commit: elastic/x-pack-elasticsearch@26e8f99571
* [DOCS] Format Watcher APIs
* [DOCS] Removed master_timeout from Watcher APIs
* [DOCS] Added authority info to watcher APIs
Original commit: elastic/x-pack-elasticsearch@1e6de3b036
As fields with underscores will be disallowed in master, and we have to
prepare the upgrade, this commit renames the _status field to status.
When the 5.x upgrade logic is in place in the 5.x we can remove all the
old style _status handling from the master branch.
Note: All the BWC compatibility tests, that load 5.x indices are now
faking a finished upgrade by adding the `status` field to the mapping
of the watches index.
Original commit: elastic/x-pack-elasticsearch@9d5cc9aaec