Fix regression in remote subscription; added hasRole() shadow method on Remote_profile.

Fix regression in remote subscription; added hasRole() shadow method on Remote_profile.

DB_DataObject hides errors by silently returning null for any non-existent method call, making it harder to tell what the heck's going on... the rights check for blocked remote users returned null for the check for subscribe rights, thus eval'ing to false. We now log a note in this circumstance, which would have cut about 3 hours off of the debug time.