[ZEPPELIN-6017] Revert changes about ZEPPELIN_IDENT_STRING in ZEPPELIN-5421

[kevinjmh]

What is this PR for?

#4146 delete the definition check about ZEPPELIN_IDENT_STRING in case of surefire version upgrade
but it will make the log file names become: 

zeppelin--SERVER.log
zeppelin--SERVER.out
zeppelin-interpreter-jdbc-shared_process–SERVER.log

in the defintion of:

zeppelin-${ZEPPELIN_IDENT_STRING}-${HOSTNAME}.log
zeppelin-${ZEPPELIN_IDENT_STRING}-${HOSTNAME}.out
zeppelin-interpreter-%INTERPRETER_ID%%ZEPPELIN_IDENT_STRING%%HOSTNAME%.log

so, we revert changes about ZEPPELIN_IDENT_STRING to fix the filename

What type of PR is it?

Hot Fix

What is the Jira issue?

https://issues.apache.org/jira/browse/ZEPPELIN-6017

[jongyoul]

@Reamer hello, could you please check this PR?

[Reamer]

Hi @kevinjmh
The changes look good to me. Can you please create a JIRA ticket and adjust the pull request description.

[kevinjmh]

Hi @kevinjmh The changes look good to me. Can you please create a JIRA ticket and adjust the pull request description.

@Reamer Please check