TraversingItemVisitor causes stackoverflowexception with breadth first traversal

TraversingItemVisitor when used in breadth first traversal mode can lead to StackOverflowException with very flat child list. This happens because it uses recursion [1] instead of plain iteration which would increase the stack size proportional to number of immediate child node.

The code technically belong to JSR-283 project. For now creating the issue here

[1] https://java.net/projects/jsr-283/sources/svn/content/trunk/src/java/javax/jcr/util/TraversingItemVisitor.java?rev=967