Description of change
The state changes to support application-level data bags on relations. Adds Relation.ApplicationSettings, .WatchApplicationSettings and .UpdateApplicationSettings, as well as an upgrade step to create application settings for each endpoint of existing relations.
Part of the implementation of Application relation data bag
QA steps
- Unit tests only - no API to call these yet.
Documentation changes
We will need charming documentation for application relation data bags when the API and uniter changes are done.
Bug reference
None
该提问来源于开源项目：juju/juju
