Refactoring and cleanup in the Metrics module:
 * Removed logging related code inside class MetricsManager
 * Removed @Component related code, because it is not suppose to be used
   as an component.
 * Added a new class-wrapper so the Metrics can be used as a loadable service:
   MetricsManagerComponent. The name and the location of this class
   will be refactored in the future.
 * Added new method MetricsManager.removeMetric()
 * Line formatting
 * Changed "interface MetricsService" to public
4 files changed