add missing transform for auth list from c2j to domain object

Author: sbiscigl

tools/code-generation/generator/src/main/java/com/amazonaws/util/awsclientgenerator/transform/C2jModelToGeneratorModelTransformer.java

@@ -261,6 +261,7 @@ Metadata convertMetadata() {
             metadata.setProtocol(c2jMetadata.getProtocol());
         }
         metadata.setProtocols(c2jMetadata.getProtocols());
+        metadata.setAuth(c2jMetadata.getAuth());
         metadata.setNamespace(c2jMetadata.getServiceAbbreviation());
         metadata.setServiceFullName(c2jMetadata.getServiceFullName());
         metadata.setSignatureVersion(c2jMetadata.getSignatureVersion());