Bug 2648 - [DS] Use of system bundle to track extendees  - also added a text describing what an extender should do with required wires to the osgi.extender namespace.
Bug 2648 - [DS] Use of system bundle to track extendees
 - also added a text describing what an extender should do with required wires to the osgi.extender namespace.

osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi,osgi/osgi