FELIX-3963 Fix InventoryPrinter/ConfigurationPrinter reflection

- InventoryPrinter only accepted as a service implementing
  the API (using ServiceFactory and dynamic import fixes
  static dependency issues better)
- ConfigurationPrinter supported through reflection for
  backwards compatibility (only public method in the service
  object class itself)
- Removing test case checking for proper reflection support
  of the InventoryPrinter (not needed any longer)

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1461705 13f79535-47bb-0310-9956-ffa450edef68