Invalid name in MySQL log file when using install_local_hadoop

This problem was reported by Wei Jun Lu (韦俊鲁) on Dec 3 on the Trafodion dev list, here is the email:

From: 韦俊鲁 weijl@teamsun.com.cn
Sent: Sunday, December 3, 2017 11:59 PM
To: dev <dev@trafodion.incubator.apache.org>
Subject: trafodion question

question 1:
when execute install_local_hadoop: under the directory local_hadoop/log generate a file named "mysql-general.${HOSTNAME}.log", why the HOSTNAME is not replaced by real value?

how to fix it?