Add test that never passes

Author: rishav-karanjit

src/test/java/software/amazon/encryption/s3/S3EncryptionClientBuilderValidationTest.java

@@ -282,4 +282,11 @@ public void testBuilderWithNullKmsKeyId() {
         );
         assertTrue(exception.getMessage().contains("Only one may be set of"));
     }
+
+    // TODO: REMOVE THIS TEST - Demo test to verify retry behavior
+    @RetryingTest(3)
+    public void testRetryDemoAlwaysFails() {
+        System.out.println("Retry attempt made - this test always fails");
+        throw new RuntimeException("Demo test to show retry behavior - REMOVE THIS TEST");
+    }
 }