TEZ-4493: Upgrade Hadoop to 3.3.6. (apache#285) (Ayush Saxena reviewed by Laszlo Bodor)

Author: ayushtkn

pom.xml

@@ -73,7 +73,7 @@
     <findbugs-maven-plugin.version>3.0.5</findbugs-maven-plugin.version>
     <frontend-maven-plugin.version>1.8.0</frontend-maven-plugin.version>
     <guava.version>31.1-jre</guava.version>
-    <hadoop.version>3.3.4</hadoop.version>
+    <hadoop.version>3.3.6</hadoop.version>
     <jdk.tools.version>1.8</jdk.tools.version>
     <jersey.version>1.19</jersey.version>
     <jettison.version>1.5.4</jettison.version>

tez-dag/src/main/java/org/apache/tez/state/StateMachineTez.java

@@ -51,6 +51,11 @@ public STATE getCurrentState() {
     return realStatemachine.getCurrentState();
   }
 
+  @Override
+  public STATE getPreviousState() {
+    return realStatemachine.getPreviousState();
+  }
+
   @SuppressWarnings("unchecked")
   @Override
   public STATE doTransition(EVENTTYPE eventType, EVENT event) throws