Fix issue #3993 (#3994) Update PutObjectAcl and PutBucketACl to write the xmlAttributes first

* Fix issue #3993. Update PutObjectAcl and PutBucketACl to write the xmlAttributes first

* remove unused variable

Author: peterrsongg

generator/.DevConfigs/ef9270cb-a2fb-454c-8276-2096a9e75b6e.json

@@ -0,0 +1,11 @@
+{
+  "services": [
+    {
+      "serviceName": "S3",
+      "type": "patch",
+      "changeLogMessages": [
+        "Fix issue #3993. PutObjectAcl was failing when Grantee's Type member was set because  the xml attribute not being written first leading to invalid xml. PutBucketAcl would also fail with the same issue if Type is set. This change writes the attributes first if they are present."
+      ]
+    }
+  ]
+}