Metacat

Add support for the various CNReplication calls. Add collectReplicationPolicy() to parse the policy out of the multipart form, and collectReplicaMetadata() to parse out the replica to be updated.

skip verification -- remaining TODO

verify certificate

inspect keystore entries for matching client certificate

lookup the correct property for keystore file

use HttpClient to set up SSL connection when doing replication calls -- this will use the server's configured certificate as the client certificate on the request. The server it is calling can then inspect that certificate and decide whether or not it trusts the caller.

check client-provided certificate when servicing ReplicationServlet requests.

Add updateReplicationMetadata() to the CN service implementation. This was missing from the API, and likely never called. It fully replaces the given replica item in the list of replicas in system metadata.

getReplica() should log replication events as DataONE Types.Event.replicate (vs 'getreplica')

Minor indentation cleanup.