B2 now returns empty usernames. We translate them to null

Author: Genbox

Src/SimpleS3.Core/Internals/Helpers/ParserHelper.cs

@@ -57,6 +57,10 @@ public static S3Identity ParseOwner(XmlReader xmlReader, string elementName = "O
                     break;
                 case "DisplayName":
                     displayName = xmlReader.ReadString();
+
+                    // To circumvent providers that return empty. We want to represent missing display names as null.
+                    if (displayName == "")
+                        displayName = null;
                     break;
             }
         }