Fix issue of adding multiple xml attributes to the same attribute_of element.
Fix sub-name implementation for xml generation of attributes.
Fix type causing error when namespace is specified in _in_message_name.
Be more specific in xpath specification to avoid adding to wrong extension in tree.
Implement sub_name attribute for xml attribute name override.
Modifiy _type_info_alt to handle multiple pairs in case of multiple XmlAttributes with the same sub_name but different attribute_of elements.
Fix typo for _type_info_alt.
Add setdefault method to odict.
Refactor code for retrieving from the _type_info_alt odict.
Fix typo in refactored code.
Fix issues with _get_type_info_alt function.
Added simple test case for the _in_message_name with a namespace use case.
Merge branch 'decorator-namespace-fix'