Add alwaysRun=true to the TestNG example's AfterClass method

Author: brasmusson

examples/java-calculator-testng/src/test/java/cucumber/examples/java/calculator/RunCukesByFeatureAndCompositionTest.java

@@ -32,7 +32,7 @@ public Object[][] features() {
         return testNGCucumberRunner.provideFeatures();
     }
 
-    @AfterClass
+    @AfterClass(alwaysRun = true)
     public void tearDownClass() throws Exception {
         testNGCucumberRunner.finish();
     }