[TEST] Remove connection listener from all transports in AbstractSimpleTransportTestCase#testSendRandomRequests

Author: s1monw

test/framework/src/main/java/org/elasticsearch/transport/AbstractSimpleTransportTestCase.java

@@ -1605,7 +1605,7 @@ public void onNodeDisconnected(DiscoveryNode node) {
         latch.await();
         serviceA.removeConnectionListener(waitForConnection);
         serviceB.removeConnectionListener(waitForConnection);
-        serviceB.removeConnectionListener(waitForConnection);
+        serviceC.removeConnectionListener(waitForConnection);
 
 
         Map<TransportService, DiscoveryNode> toNodeMap = new HashMap<>();