XSL Transformation: user-defined extension should be kept on same level in resulting document

[sboeckelmann]

current the XSL convert-2.0-to-1.2.xsl moves user-defined attributes from event's root level into Path extension/extension/extension

user defined extension elements must not be moved down into any extension elements but have to be kept where they were located in the original XML Document.

[sboeckelmann]

@CraigRe @mgh128 please assign to me. I am already taking care of it

[Craig Alan Repec]

Thanks @sboeckelmann !