[ZEPPELIN-5884] fix: wrong path of test folder in Java Interpreter

[tranvanthai]

What is this PR for?

Currently, the path of the test folder in the Java Interpreter module was wrong. I open this PR to correct it.

What type of PR is it?

Improvement

Todos

• - Move the test folder of Java Interpreter to the correct path

What is the Jira issue?

• https://issues.apache.org/jira/browse/ZEPPELIN-5884

How should this be tested?

• Check the test was run

Screenshots (if appropriate)

Questions:

• Does the license files need to update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[Reamer]

The change looks good. The test classes are now respected, also by Checkstyle. Please correct the Checkstyle errors.
https://github.com/apache/zeppelin/actions/runs/4249994176/jobs/7394695038

[Reamer]

The tests run through, but without log output. In my opinion, this can be omitted at the moment. How do you see it?

2023-02-24T08:53:44.5652238Z [INFO] -------------------------------------------------------
2023-02-24T08:53:44.5652658Z [INFO]  T E S T S
2023-02-24T08:53:44.5653098Z [INFO] -------------------------------------------------------
2023-02-24T08:53:45.0138413Z [INFO] Running org.apache.zeppelin.java.JavaInterpreterUtilsTest
2023-02-24T08:53:45.5101854Z [INFO] Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.495 s - in org.apache.zeppelin.java.JavaInterpreterUtilsTest
2023-02-24T08:53:45.5108854Z [INFO] Running org.apache.zeppelin.java.JavaInterpreterTest
2023-02-24T08:53:45.6120582Z log4j:WARN No appenders could be found for logger (org.apache.zeppelin.java.StaticRepl).
2023-02-24T08:53:45.6121148Z log4j:WARN Please initialize the log4j system properly.
2023-02-24T08:53:45.6121610Z log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
2023-02-24T08:53:45.6155493Z [INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.103 s - in org.apache.zeppelin.java.JavaInterpreterTest
2023-02-24T08:53:45.9381040Z [INFO] 
2023-02-24T08:53:45.9381487Z [INFO] Results:
2023-02-24T08:53:45.9381784Z [INFO] 
2023-02-24T08:53:45.9383174Z [INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0