Celix bundles impl

Although there will be more work on the Processor to include also the DataStore, we can already  think about merge this state back into the master.  What do you think?
This boolean should not be needed. The idea is that the component API is published by a service. The destroy will happen after a  unregister of the service and therefore the component API is not reachable any more (well depending on good behaviour of the consumer, but that is C). IMO this adds unneeded complexity.