ResolveContext should stop searching for capabilities once it found a match

If I read the osgi.enterprise-5.0.0 spec correctly it says in section 134.6 that searching for capabilities should stop once a repository returns results. The current resolvecontext does not do this but instead keeps on searching which might return results.

Don't know if this causes behaviour that is not according to spec. but I can imagine that it might cause the resolver to have a more difficult time or it resolves to something that it should not.