iPOPO dependency manager refactoring
iPOPO dependency manager refactoring

- StoredInstance isn't a service listener anymore
- Dependency managers react to service events and notify the StoredInstance
  -> avoids to handle events that doesn't match the requirement filter.
- Simplification of the component instanciation (not a special case anymore)

ahmadshahwan/ipopo,tcalmant/ipopo,ahmadshahwan/ipopo