unmuted test

Original commit: elastic/x-pack-elasticsearch@8bd95e427e

shield/src/test/java/org/elasticsearch/shield/transport/TransportFilterTests.java

@@ -44,8 +44,6 @@ import static org.mockito.Mockito.*;
  *
  */
 @ClusterScope(scope = SUITE, numDataNodes = 0)
-@LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/pull/13215")
-// fails because the test infrastructure already registers a transport service (InternalTestCluster#getPlugins()) and there for the transport service used here can't be registered
 public class TransportFilterTests extends ESIntegTestCase {
 
     @Override
@@ -55,6 +53,11 @@ public class TransportFilterTests extends ESIntegTestCase {
                 .build();
     }
 
+    @Override
+    protected boolean enableMockModules() {
+        return false;
+    }
+
     @Override
     protected Collection<Class<? extends Plugin>> nodePlugins() {
         return Arrays.asList(InternalPlugin.class, InternalPluginServerTransportService.TestPlugin.class);