* Fix cleanup of Current entry in case a follower is removed from Plan. (#6623)
* Properly remove unplanned followers in leader and Current.
* Add a catch test.
* Fix tests.
* Fix a bug with a temporary object.
* Protect against exception from getCollection not found.
* New Maintenance test data.
- Schmutz now called "Maintenance" and completely implemented in C++
- Fix index locking bug in mmfiles
- Fix a bug in mmfiles with silent option and repsert
- Slightly increase supervision okperiod and graceperiod