Backport: Async component rendering request does not include query parameters for the async component

If you mark a component with hst:async = true it will fetch that component asynchronous. However, it should repeat the query string if available.

Reproduction of the problem:

1) start up the old archetypes project
2) Goto http://localhost:8080/cms/console/?path=/hst:hst/hst:configurations/gettingstarted/hst:pages/overview/main/content and add:

hst:parameterNames =

hst:parameterValue =

hst:async = true

Now visit http://localhost:8080/site/news

You cannot page correctly now since the async URL does not contain the query string any more