Method which renames an ami by copying to a new ami with a new name (only way this is possible in AWS)
        :param ami_name:
        :param new_ami_name:
        :return:

def rename_image(self, ami_name, new_ami_name, source_region='us-east-1'):
        """
        Method which renames an ami by copying to a new ami with a new name (only way this is possible in AWS)
        :param ami_name:
        :param new_ami_name:
        :return:
        """
        print "Re-naming/moving AMI to desired name and region"
        image_id = self.get_image_id_by_name(ami_name, source_region)
        self.copy_ami_to_new_name(image_id, new_ami_name, source_region)
        self.deregister_image(image_id, source_region)