Integration test: Fix auth error message test failure

Update the test to expect the new auth error message.

Display a better error message if the assertion
fails in the future.

Change-Id: Id28bc582ee2fd271a61d9c48bbb49c9554a805e4
Reviewed-on: https://review.couchbase.org/c/couchbase-jvm-clients/+/212624
Tested-by: Build Bot <[email protected]>
Reviewed-by: David Nault <[email protected]>

core-io/src/integrationTest/java/com/couchbase/client/core/io/netty/kv/KeyValueChannelIntegrationTest.java

@@ -51,6 +51,7 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.assertInstanceOf;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertFalse;
@@ -156,7 +157,7 @@ protected void initChannel(SocketChannel ch) {
         }
       });
 
-    assertAuthenticationFailure(bootstrap, "Authentication Failure");
+    assertAuthenticationFailure(bootstrap, "User authentication failed");
   }
 
   @Test
@@ -178,7 +179,7 @@ protected void initChannel(SocketChannel ch) {
         }
       });
 
-    assertAuthenticationFailure(bootstrap, "Authentication Failure");
+    assertAuthenticationFailure(bootstrap, "User authentication failed");
   }
 
   @Test
@@ -220,7 +221,7 @@ private void assertAuthenticationFailure(final Bootstrap bootstrap, final String
     assertFalse(f.get().isSuccess());
     Throwable ex = f.get().cause();
     assertInstanceOf(AuthenticationFailureException.class, ex);
-    assertTrue(ex.getMessage().contains(msg));
+    assertThat(ex.getMessage()).contains(msg);
   }
 
 }