reuse env from deploy_local_maven_repo which already is populated with MAVEN_OPTS also in junit-maven run with vanilla jdk

Author: tomasstupka

mx.graalpython/mx_graalpython.py

@@ -1441,7 +1441,7 @@ def graalpython_gate_runner(args, tasks):
 
             env['JAVA_HOME'] = os.environ['JAVA_HOME']
             mx.log(f"Running integration JUnit tests on vanilla JDK: {os.environ.get('JAVA_HOME', 'system java')}")
-            mx.run_maven(mvn_cmd_base + ['-U', '-Dpolyglot.engine.WarnInterpreterOnly=false', 'clean', 'test'])
+            mx.run_maven(mvn_cmd_base + ['-U', '-Dpolyglot.engine.WarnInterpreterOnly=false', 'clean', 'test'], env=env)
 
     # Unittests on JVM
     with Task('GraalPython Python unittests', tasks, tags=[GraalPythonTags.unittest]) as task: