Based on patch from Damjan Jovanovic damjan.jov@gmail.com
https://bugs.winehq.org/show_bug.cgi?id=53531
-- v3: msxml3: Handle default namespace in get_namespaceURI. msxml3: Handle default namespace in get_prefix. msxml3: Handle default namespace in get_nodeName. msxml3: Handle default namespace in get_baseName. msxml3: Handle null prefix in get_item. msxml6/tests: Add tests for default namespace. msxml4/tests: Add tests for default namespace. msxml3/tests: Add tests for default namespace. msxml6/tests: Copy create namespace tests. msxml4/tests: Copy create namespace tests. msxml6/tests: Copy namespaces as attributes tests. msxml4/tests: Copy namespaces as attributes tests. msmxl3/tests: Add tests for get_xml. msxml3/tests: Remove msxml6 tests. msxml3/tests: Fix failure messages.