OWB-894 remove UIComponent restrcition 

According to the original WebBeans spec draft (version 20081029.pdf)
a UIComponent must not be a bean. 
This restriction got removed since before the spec went final. 
So we now gonna remove this code as well.


git-svn-id: https://svn.apache.org/repos/asf/openwebbeans/trunk@1530622 13f79535-47bb-0310-9956-ffa450edef68