* Access control: Combine permissions through predefined roles
When certain permission is required for built-in role, instead of adding those permissions to the existing predefined roles, we need to have granular predefined roles with those permissions.
* Better copy...
* Adding and fixing tests
* Remove duplicated permission
* Usage Stats: Remove unused method for getting user stats
This was used in enterprise codebase, but is not longer in use, thus can be safely removed.
* Force refresh user stats in tests
Usage Stats: Calculate concurrent users as a histogram
Metric will help to understand if users are sharing their credentials or using one account for concurrent sessions. This will help to make more informed decisions when enforcing any license limitations on credentials usage.
Adding an interface type for usage stats service allows us to not depend on the implementation outside of the package, for example when testing we can easily mock the service
The change allows to add external, additional metrics which will be reported with the rest of hardcoded metrics, allowing to add metrics without a need to change the service itself.
Vardan Torosyan
