Layout set impl company virtualhost name caching

CC @zsoltbalogh @mhan810

This is really a blind fix, I don't know what test you were running and which version of portal you were using.
But base on the profiler snapshot, I am fairly certain it is the cause.

Please rerun your test, let me know the result. If the problem is still there, I will need to know more detail and try to reproduce it locally.