fix unit tests that run after

Beria · Beria · commit 599281ffc90e · 2016-08-09T15:11:00.000+05:30
diff --git a/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/remote/CheckAppendOutputRunner.java b/zeppelin-interpreter/src/main/java/org/apache/zeppelin/interpreter/remote/CheckAppendOutputRunner.java
@@ -86,6 +86,7 @@ public static void stopSchedulerAndRunnerForUnitTests() {
       if (thread != null && thread.isAlive()) {
         thread.interrupt();
       }
+      SCHEDULED_SERVICE = null;
     }
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -86,6 +86,7 @@ public static void stopSchedulerAndRunnerForUnitTests() {`
`86`	`86`	`if (thread != null && thread.isAlive()) {`
`87`	`87`	`thread.interrupt();`
`88`	`88`	`}`
	`89`	`+ SCHEDULED_SERVICE = null;`
`89`	`90`	`}`
`90`	`91`	`}`
`91`	`92`	`}`