STYLE: MRMLNodeTest1: Add test for CopyWithScene() node method. See 0003462

It allowed to identify the following unsupported case:

Calling CopyWithScene after the copied node has been added
to the scene will be problematic. In that case, (a) the source
and copied node will end up having the same ID and (b) the scene
cache and reference list won't be up-to-date either.

This is explained because the method CopyWithScene systematically
copy the nodeID from the source node without asking the scene
to generate a new one if the scene is set.

Issue 0004078 has been created to keep track of the problem.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@24718 3bd1e089-480b-0410-8dfb-8563597acbee