title: bug with "-> not for ..." in siddhi?
body: <p>I added the following testcase into AbsentWithEveryPatternTestCase.java, but the test had been failed, which I think should success. So, is there a bug with "-> not for ..." pattern?</p>
  
  <pre><code>@Test
  public void testQuery7() throws InterruptedException {
      log.info("Test the query every e1 -&gt; not e1 for 1 sec with e1 only");
  
      SiddhiManager siddhiManager = new SiddhiManager();
  
      String streams = "@app:playback(idle.time = '10 milliseconds', increment = '10 milliseconds') " +
              "define stream Stream1 (symbol string, price float, volume int); ";
      String query = "" +
              "@info(name = 'query1') " +
              "from every e1=Stream1[price&gt;20] -&gt; not Stream1[symbol==e1.symbol and price&gt;e1.price] for 1sec " +
              "select e1.symbol as symbol " +
              "insert into OutputStream ;";
  
      SiddhiAppRuntime siddhiAppRuntime = siddhiManager.createSiddhiAppRuntime(streams + query);
  
      TestUtil.TestCallback callback = TestUtil.addQueryCallback(siddhiAppRuntime, "query1", new Object[]{"GOOG"});
  
      InputHandler stream1 = siddhiAppRuntime.getInputHandler("Stream1");
  
      siddhiAppRuntime.start();
  
      stream1.send(1544512385000L, new Object[]{"WSO2", 55.6f, 100});
      stream1.send(1544512385100L, new Object[]{"GOOG", 55.6f, 100});
      stream1.send(1544512385800L, new Object[]{"WSO2", 55.7f, 100});
      stream1.send(1544512386200L, new Object[]{"GOOG", 55.6f, 100});
  
      callback.throwAssertionErrors();
      AssertJUnit.assertEquals("Number of success events", 1, callback.getInEventCount());
      AssertJUnit.assertEquals("Number of remove events", 0, callback.getRemoveEventCount());
      AssertJUnit.assertTrue("Event arrived", callback.isEventArrived());
  
      siddhiAppRuntime.shutdown();
  }
  </code></pre>