Accounting for the possibility that user will initialize as 'Xorc' instead of a long before publishing an initial service config (#134)

Author: jonmartinms

Microsoft.Xbox.Service.DevTools/XblConfig/History.cs

@@ -29,7 +29,7 @@ public class History
         /// <summary>
         /// Gets or sets the user ID of the user that initiated the commit.
         /// </summary>
-        public ulong User { get; set; }
+        public string User { get; set; }
 
         /// <summary>
         /// Gets or sets the version of the changeset.