use maven to manage most jar dependencies in Metacat.Exceptions include: LSID, Datamamager (EML),
select only distinct guids (synch may have failed more than once for any given guid)https://redmine.dataone.org/issues/3539
include xml_revisions.do not allow removal of server_location = 1 documents (these are not replicas).https://redmine.dataone.org/issues/3539
class for removing failed/invalid replicas from target nodes that previously held replicated content (KNB/LTER/PISCO/etc). https://redmine.dataone.org/issues/3539