InternalDispatcher builds corrupt UriInfo on forward

If a forward is performed via one of the methdos of InternalDispatcher, the invoked resource method gets an invalid UriInfo object injected.

Reason: The UriInfo that is used inside the MockHttpRequest used by InternalDispatcher does not have the correct base URI set. That's because MockHttpRequest.create(String httpMethod, String uri) uses the given (relative) URI as absolute request URI as well as base URI.