[#25811] Added module to block an account after 60 days of inactivity

Includes behat tests.

How it works:
* When a user logs in it schedules the account to be blocked after 60 days
* If after 60 days they have not logged in again, then cron will run the scheduled task and make the account blocked.
* However if they log in again, the action is scheduled again and replaces the existing task since it has the same identifier (that is how rules scheduler works).