[LMS-2205] minor: add property to service properties

SVN: 21028

datastore_server/etc/service.properties

@@ -371,6 +371,8 @@ archiver.class = ch.systemsx.cisd.openbis.dss.generic.server.plugins.standard.Rs
 #archiver.destination = openbis:tmp/dest
 # remote:
 archiver.destination = /Users/openbis/dest
+# indicates if data should be synchronized when local copy differs from one in archive (default: true)
+archiver.synchronize-archive = true
 
 # ---------------------------------------------------------------------------
 # maintenance plugins configuration