TaskVcsTest: reset myChangeListManager in tearDown

plugins/tasks/tasks-tests/test/com/intellij/tasks/vcs/TaskVcsTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2012 JetBrains s.r.o.
+ * Copyright 2000-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -493,6 +493,7 @@ public class TaskVcsTest extends CodeInsightFixtureTestCase {
     finally {
       myTaskManager = null;
       myVcs = null;
+      myChangeListManager = null;
     }
     super.tearDown();
   }