Fix orderXMLName and add operator/templateUpdateDate/templateDescription fields in harvestInfo.xml

We should replace orderXMLName (which was meant for H1) by templateName (which would be more generic and compatible with H3).

Also, to ease the extraction of configuration information for a preservation repository, we should also like to include three more fields.
<operator> => metadata.operator in crawler-bean.cxml
<templateUpdateDate> => metadata.date in crawler-bean.cxml
<templateDescription> => metadata.description in crawler-bean.cxml