[TEST] Replace reference to blacklist with failed (elastic#75866)

This commit replaces use of "blacklist" with "failed" to better
reflect the behaviour of the test

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authc/ldap/support/SessionFactoryLoadBalancingTests.java

@@ -319,7 +319,7 @@ private PortBlockingRunnable(InetAddress serverAddress, int serverPort, int port
         @Override
         public void run() {
             final List<Socket> openedSockets = new ArrayList<>();
-            final List<InetAddress> blacklistedAddress = new ArrayList<>();
+            final List<InetAddress> failedAddresses = new ArrayList<>();
             try {
                 final boolean allSocketsOpened = waitUntil(() -> {
                     try {
@@ -331,16 +331,16 @@ public void run() {
                         }
                         final List<InetAddress> inetAddressesToBind = Arrays.stream(allAddresses)
                             .filter(addr -> openedSockets.stream().noneMatch(s -> addr.equals(s.getLocalAddress())))
-                            .filter(addr -> blacklistedAddress.contains(addr) == false)
+                            .filter(addr -> failedAddresses.contains(addr) == false)
                             .collect(Collectors.toList());
                         for (InetAddress localAddress : inetAddressesToBind) {
                             try {
                                 final Socket socket = openMockSocket(serverAddress, serverPort, localAddress, portToBind);
                                 openedSockets.add(socket);
                                 logger.debug("opened socket [{}]", socket);
                             } catch (NoRouteToHostException | ConnectException e) {
-                                logger.debug(new ParameterizedMessage("blacklisting address [{}] due to:", localAddress), e);
-                                blacklistedAddress.add(localAddress);
+                                logger.debug(new ParameterizedMessage("marking address [{}] as failed due to:", localAddress), e);
+                                failedAddresses.add(localAddress);
                             }
                         }
                         if (openedSockets.size() == 0) {