Delete the table/columnfamily.

        :param client: A Cassandra CQL client
        :type client: silverberg.client.CQLClient

        :param lock_table: A table/columnfamily table name for holding locks.
        :type lock_table: str

def drop_schema(client, table_name):
        """
        Delete the table/columnfamily.

        :param client: A Cassandra CQL client
        :type client: silverberg.client.CQLClient

        :param lock_table: A table/columnfamily table name for holding locks.
        :type lock_table: str
        """
        query = 'DROP TABLE {cf}'
        return client.execute(query.format(cf=table_name),
                              {}, ConsistencyLevel.QUORUM)