* fix test config: use full path to java executable

passing the path to the JVM make the execution fail
```
17:39:22 -------------------------------------------------------
17:39:22  T E S T S
17:39:22 -------------------------------------------------------
17:39:22 /bin/sh: 1: /usr/local/jvm/java-11-openjdk-amd64/jvm: Permission denied
17:39:22 
17:39:22 Results :
17:39:22 
17:39:22 Tests run: 0, Failures: 0, Errors: 0, Skipped: 0
```