Make constructors of ServiceConfig and ServiceStatus private.

Those objects are not meant to be instantiated directly but only using
the Deserialize() methods which takes care of creating a new object in
case deserializing fails for the status class.

ATxCommon/Serializables/ServiceConfig.cs

@@ -224,9 +224,9 @@ namespace ATxCommon.Serializables
 
 
         /// <summary>
-        public ServiceConfig() {
         /// ServiceConfig constructor, currently empty.
         /// </summary>
+        private ServiceConfig() {
             Log.Trace("ServiceConfig() constructor.");
         }
 

ATxCommon/Serializables/ServiceStatus.cs

@@ -40,7 +40,7 @@ namespace ATxCommon.Serializables
         /// <summary>
         /// The constructor, setting default values.
         /// </summary>
-        public ServiceStatus() {
+        private ServiceStatus() {
             _currentTransferSrc = "";
             _currentTargetTmp = "";
             _transferInProgress = false;