Set the new credential values to the credentials to use, and delete the new ones

def updateNewCredentialValues(self):
        """
        Set the new credential values to the credentials to use, and delete the new ones
        """

        credentials_base = "disk.0.os.credentials."
        new_credentials_base = "disk.0.os.credentials.new."

        for elem in ['password', 'public_key', 'private_key']:
            if self.getValue(new_credentials_base + elem):
                self.setValue(credentials_base + elem, self.getValue(new_credentials_base + elem))
                self.delValue(new_credentials_base + elem)