private String[] SQLLineCmdBuild(String sqlScriptFile) {
        return new String[] {"-u", getJdbcUrl(),
                            "-d", getJdbcDriver(),
                            "-n", getRootUser(),
                            "-p", getRootPassword(),
                            "--isolation=TRANSACTION_READ_COMMITTED",
                            "-f", sqlScriptFile};

    }
Return the password of the root user.

Override the method if the password must be different than the default.
itests/util/src/main/java/org/apache/hadoop/hive/ql/externalDB/AbstractExternalDB.java