Metacat

implement assertRelation

implement CNReplication.setReplicationStatus() but with a note about selecting which replica's status should be set (right now it is all)

implement CNReplication.setReplicationPolicy

correction: implementation is CN-specific

implement getChecksum() in the superclass

implement getChecksum (retrieves from system metadata)

use shared get() method from superclass

use shared getLogRecords method

Remove isAuthorized(), setAccessPolicy(), and getLogRecords() methods since they're implemented in the superclass.

use Permission, not Event for isAuthorized() methods