MAPREDUCE-7468. [Addendum] Fix TestMapReduceChildJVM unit tests. (#6451)

Author: brumi1024

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TestMapReduceChildJVM.java

@@ -108,6 +108,7 @@ private void testReduceCommandLine(Configuration conf)
 
     MyMRApp app = new MyMRApp(0, 1, true, this.getClass().getName(), true);
     conf.setBoolean(MRConfig.MAPREDUCE_APP_SUBMISSION_CROSS_PLATFORM, true);
+    conf.setBoolean(MRJobConfig.MAPREDUCE_JVM_ADD_OPENS_JAVA_OPT, true);
     Job job = app.submit(conf);
     app.waitForState(job, JobState.SUCCEEDED);
     app.verifyCompleted();
@@ -149,7 +150,7 @@ private void testReduceCommandLine(Configuration conf)
   }
 
   @Test (timeout = 30000)
-  public void testCommandLineWithLog4JConifg() throws Exception {
+  public void testCommandLineWithLog4JConfig() throws Exception {
 
     MyMRApp app = new MyMRApp(1, 0, true, this.getClass().getName(), true);
     Configuration conf = new Configuration();
@@ -165,7 +166,7 @@ public void testCommandLineWithLog4JConifg() throws Exception {
       "[" + MRApps.crossPlatformify("JAVA_HOME") + "/bin/java" +
       " -Djava.net.preferIPv4Stack=true" +
       " -Dhadoop.metrics.log.level=WARN " +
-      "  -Xmx820m <ADD_OPENS> -Djava.io.tmpdir=" + MRApps.crossPlatformify("PWD") + "/tmp" +
+      "  -Xmx820m -Djava.io.tmpdir=" + MRApps.crossPlatformify("PWD") + "/tmp" +
       " -Dlog4j.configuration=" + testLogPropertieFile +
       " -Dyarn.app.container.log.dir=<LOG_DIR>" +
       " -Dyarn.app.container.log.filesize=0" +