fix: properly close watches at the end of tests

Author: metacosm

operator-framework/src/test/java/io/javaoperatorsdk/operator/IntegrationTestSupport.java

@@ -132,6 +132,8 @@ public void teardownIfSuccess(TestRun test) {
     try {
       test.run();
 
+      operator.close();
+
       log.info("Deleting namespace {} and stopping operator", TEST_NAMESPACE);
       Namespace namespace = k8sClient.namespaces().withName(TEST_NAMESPACE).get();
       if (namespace.getStatus().getPhase().equals("Active")) {