Metacat

Add a new method -updateSystemMetadata. It only can be called by CNs.

Refactory the authorize methods on D1NodeService.
Add the check for whom can call mn.updatesystemMetadata.

Committed the change which Andreit did.
1. Add the code for synchronize(not implemented)
2. Add the code for addForm.

remove portal servlet and configuration - no need for this if we are supporting auth tokens from authentication service.

defer to D1 PortalCertificateManager to pull authentication credentials from the request before defering to old Metacat cookie session

Add the code to check the authorization of the client which is reindexing a pid.

Created the updateSystemMetadata method.

Add the code to check if the current node is the authoritative node for the the given pid.

Add the check of permission to update the system metadata.

add whoami endpoint to make debugging authn/authz easier as we use additional mechanisms for proving identity.