Fix conditional blocks

Author: RanVaknin

services/s3/src/main/java/software/amazon/awssdk/services/s3/internal/handlers/ExceptionTranslationInterceptor.java

@@ -75,9 +75,7 @@ public Throwable modifyException(Context.FailedExecution context, ExecutionAttri
                                             .message(message)
                                             .build();
             }
-        }
-
-        if (exception.statusCode() == 503) {
+        } else if (exception.statusCode() == 503) {
             if ("Slow Down".equals(errorDetails.sdkHttpResponse().statusText().orElse(null))) {
                 return S3Exception.builder()
                                   .awsErrorDetails(fillErrorDetails(errorDetails, "SlowDown",
@@ -88,9 +86,7 @@ public Throwable modifyException(Context.FailedExecution context, ExecutionAttri
                                   .message(message)
                                   .build();
             }
-        }
-
-        if (errorDetails.errorMessage() == null) {
+        } else if (errorDetails.errorMessage() == null) {
             // Populate the error message using the HTTP response status text. Usually that's just the value from the
             // HTTP spec (e.g. "Forbidden"), but sometimes S3 throws some more useful things in there, like "Slow Down".
             String errorMessage = errorDetails.sdkHttpResponse().statusText().orElse(null);