Fix javadoc of AbstractOutputTransformerContainer

(cherry picked from commit 135c4f00215398f87de4c76595ed3762ef1f4af5)
Avoid visiting some children more than once when searching for markup of a child.

When the ComponentTag of a child Component is nested inside a sibling
Component's ComponentTag,
AssociatedMarkupSourcingStrategy.searchMarkupInTransparentResolvers() is
called to attempt find the markup from inside component resolving markup
containers.

WICKET-5569 introduced behavior to use the visitor pattern to traverse
the Component tree and find these component resolving markup containers
however nested they may be.

Since the highest (page-most) component resolving markup container
component tree will probably cause a call to
searchMarkupInTransparentResolvers() if the markup is not found, there
is no need to descend any deeper than the first component resolving
markup container in that method.

(cherry picked from commit a4ae23c635b6e8f71d9e616fbc22f60c74e176d0)
WICKET-5713 Move /wicket.properties to /META-INF/wicket/xyz.properties

Add support for traversing JBoss' VFS
WICKET-5724 Queueing component in autocomponent
WICKET-5724 Renamed innerQueue to internalQueue
WICKET-5724 Code improved as suggested by Martin Grigorov.
WICKET-5724 Refactoring of the current solution.