UriTemplateMatcher should tolerate empty @PathParam segments

If a @Path is specified as such:

@Path("/first

{firstParams:.*}

/second

{secondParams:.*}

")

We should be able to tolerate empty path part of the PathParam. In other words, if only matrix params are sent, we should tolerate that:

http://localhost/p/first;name=bob/second;eyes=blue

Please see patch with test.