Get a list of tables that exist in dbconn
    :param dbconn: master database connection
    :return: List of uuids in the database

def get_uuid_list(dbconn):
    """
    Get a list of tables that exist in dbconn
    :param dbconn: master database connection
    :return: List of uuids in the database
    """
    cur = dbconn.cursor()
    tables = get_table_list(dbconn)
    uuids = set()
    for table in tables:
        cur.execute("SELECT (UUID) FROM '{table}'".format(table=table))
        uuid = set([i[0] for i in cur.fetchall()])
        if uuid:
            uuids.update(uuid)
    return uuids