make nodeproperty public

Core/src/org/sleuthkit/autopsy/datamodel/NodeProperty.java

@@ -24,9 +24,8 @@
 /**
  * This class is used to represent the properties for each node.
  *
- * @author jantonius
  */
-class NodeProperty extends PropertySupport.ReadOnly {
+public class NodeProperty extends PropertySupport.ReadOnly {
 
     private Object value;