Tests that elements panel updates dom tree structure upon changing the attribute with namespace.
Running: testDumpInitial
========= Original ========
<a id="node" xlink:href="http://localhost">link</a>
Running: testAttributeUpdated
===== On attribute set =====
<a id="node" xlink:href="changed-url">link</a>
Running: testAttributeRemoved
=== On attribute removed ===
<a id="node">link</a>