properly deal with overriding parent's tearDown method

Original commit: elastic/x-pack-elasticsearch@0edd4b1e20

elasticsearch/src/test/java/org/elasticsearch/license/AbstractLicenseServiceTestCase.java

@@ -69,7 +69,8 @@ public abstract class AbstractLicenseServiceTestCase extends ESTestCase {
     }
 
     @After
-    public void tearDown() {
+    public void tearDown() throws Exception {
+        super.tearDown();
         licenseService.stop();
     }
 }

elasticsearch/src/test/java/org/elasticsearch/xpack/common/http/HttpClientTests.java

@@ -62,7 +62,7 @@ public class HttpClientTests extends ESTestCase {
     }
 
     @After
-    public void shutDown() throws Exception {
+    public void shutdown() throws Exception {
         webServer.shutdown();
     }
 

elasticsearch/src/test/java/org/elasticsearch/xpack/security/authz/accesscontrol/SecurityIndexSearcherWrapperUnitTests.java

@@ -150,6 +150,7 @@ public class SecurityIndexSearcherWrapperUnitTests extends ESTestCase {
 
     @After
     public void tearDown() throws Exception {
+        super.tearDown();
         esIn.close();
     }