@Override
  public void alter_table(String dbname, String tbl_name, Table new_tbl) throws TException {
    alter_table_with_environmentContext(dbname, tbl_name, new_tbl, null);
  }
Swaps the first element of the metastoreUris array with a random element from the
remainder of the array.
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/HiveMetaStoreClient.java