When normalising Office file types that go through the OfficeToXenaOooNormaliser the description is hardcoded to say that the product used is "Open Office 2.0" which is not necessarily always the case.
Added new section to OpenOfficeConverter to get the product name and version using UNO. Currently added a new static method getProductId but this may want to be changed later (to non-static) as it probably results in two calls to get the service manager for the office converter (OpenOffice/LibreOffice).
Assigned to acunliffe to test.
Tested in Xena Testing Branch (Date: Tue Aug 9 16:33:05 2011 +1000)
Tested in Windows and Linux (Fedora 14) with .doc, .xls and .ppt.
Metadata now reflects the actual version of OpenOffice or LibreOffice used to normlise office documents.