Activates this database within the given orb instance.  This will
        register the database to orb and then set it as the active one.
        
        :param      manager | <orb.Manager>

def activate(self, manager=None):
        """
        Activates this database within the given orb instance.  This will
        register the database to orb and then set it as the active one.
        
        :param      manager | <orb.Manager>
        """
        manager = manager or orb.system
        manager.activate(self)
        return True