#538  The CSW harvester doesn't update the change date of the local metadata

Updated these harvesters to extract the change date from the metadata xml and call insertMetadata with the parameter to update the change date in the database

* ArcSDE
* CSW
* Local file system
* OAIPMH
* WebDav

This allows to keep in synch the xml change date (`gmd:dateStamp` in iso19139) and the database field in the metadata table that tracks the change date.