Refactor: Added methods to properly invoke Services

  * For each Berserk Service, a method runServiceName has
    been added, which does proper access control
  * Also made Service's execute method protected, to prevent
    invocations without access control
Refactor: Monitored services are now logged using a regular logger.

  * Updated SLF4J to 1.7.5
Refactor: Replace ServiceManagerServiceFactory invocations with direct ones.

  * Added missing 'run's for overloaded methods
Project Management services are disabled for now
Refactor: Removed FenixService

  * Also organized imports
Removing FenixFilterException
Removed Berserk
Bug Fix: Ensure RootDomainObject is initialized on startup
Removing unused filters and services
Removing unused DTO's