Fixes to SLM

- Made changes so SLM is more robust and deals with failed installs
better (i.e. tries to delete the file, times out, etc)
- Service Discovery and Service Control will now unregister from CIS
events when they are removed (better clean-up!)
- Removed not supported methods from Service Control API
- Solved a minor concurrency issue in the T6.5 App page controller.
- Renamed some classes for more clarity.