more tests for CORS NYI so far

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8767 5f5364db-9458-4db8-a492-e30667be6df6
start fixing our XMLHttpRequest CORS implementation

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8768 5f5364db-9458-4db8-a492-e30667be6df6
JavaScript: element.setAttributeNode() applies to XML as well.

Issue 1553

git-svn-id: svn://svn.code.sf.net/p/htmlunit/code/trunk@8769 5f5364db-9458-4db8-a492-e30667be6df6