Workaround for ReflectASM bug.

- When spanning multiple class loaders,
  Object cannot be instantiated from 'protected' constructor.

Change-Id: Iacb33755ccf3da3d8ec28623b9d3aaa28870208d

@@ -96,4 +96,13 @@ public class DefaultDeviceDescription extends AbstractDescription
                 .toString();
     }
 
+    // default constructor for serialization
+    private DefaultDeviceDescription() {
+        this.uri = null;
+        this.type = null;
+        this.manufacturer = null;
+        this.hwVersion = null;
+        this.swVersion = null;
+        this.serialNumber = null;
+    }
 }

@@ -48,4 +48,9 @@ public class DefaultPortDescription extends AbstractDescription
         return isEnabled;
     }
 
+    // default constructor for serialization
+    private DefaultPortDescription() {
+        this.number = null;
+        this.isEnabled = false;
+    }
 }

@@ -82,7 +82,7 @@ public final class Timestamped<T> {
 
     // Default constructor for serialization
     @Deprecated
-    protected Timestamped() {
+    private Timestamped() {
         this.value = null;
         this.timestamp = null;
     }