refactor Metacat access handling to be on a per-revision basis so that it more closely aligns with the DataONE approachhttp://bugzilla.ecoinformatics.org/show_bug.cgi?id=5560
Pass the doc xml as a string to docImpl.write and writeRepication. This is so a reader can be create for the parsing and for the write to disk. Also created a db access class for xml query result deletion.