Bug 454256 - [http] add customizer to provide default context selection
and context path prefix
 - only reset if the contextServiceTracker is still open
Bug 454183 - [http] Update implementation of legacy HttpService on top
of the whiteboard implementation
 - need to catch IllegalStateException when ungetting services.
Bug 455352 - [http] Add a service property to ServletContextHelper registrations for old HttpContext indicating the initiating bundle id
Bug 455528 - [http] improve context name generated for HttpContext ServletContextHelpers