[CXF-9209] UriInfoImpl#getMatchedResourceTemplate support variable Paths

[jungm]

See CXF-9209

TCK run is passing in TomEE with these changes

[reta]

@jungm I believe this is not the correct implementation since it captures the part of the URI which is outside of the JAX-RS scope. The test case from below is confirming that:

Message m = mockMessage("http://localhost:8080/app", "/foo/one/abc");
assertEquals("/app/foo/one/{name:[a-zA-Z][a-zA-Z_0-9]*}", u.getMatchedResourceTemplate());

I believe the /app should not be included in the resource template (it is managed externally, could be set by servlet container / application server / ...), it is reasonable to assume the correct template in this case should be /foo/one/{name:[a-zA-Z][a-zA-Z_0-9]*}.