wrapped the body of a for in an if statement to filter unwanted properties - based on the warning received in travis run

lib/common/lib/services/serviceclient.js

@@ -755,16 +755,19 @@ ServiceClient._normalizeError = function (error, response) {
 
     var odataErrorFormat = error['odata.error'] ? 1 : 0;
     var errorProperties = error.Error || error.error || error['odata.error'] || error;
-    for (var property in errorProperties) {
-      var value = null;
-      if (odataErrorFormat) {
+    if (odataErrorFormat) {
+      for (var property in errorProperties) {
+        var value = null;
         if (property === 'message' && !azureutil.objectIsString(errorProperties[property]) && 
             errorProperties[property]['value']) {
           value = errorProperties[property]['value'];
           normalizedError[property.toLowerCase()] = value;
         }
       }
-      else {
+    }
+    else {
+      for (var property in errorProperties) {
+        var value = null;
         if (property !== Constants.XML_METADATA_MARKER) {
           if (errorProperties[property] && errorProperties[property][Constants.XML_VALUE_MARKER]) {
             value = errorProperties[property][Constants.XML_VALUE_MARKER];