Add a loadNodes() to releaseNode() so we are sure child index has been loaded.

This is to prevent the index to be loaded subsequently, which potentially would
reintroduce the released node.

src/helma/objectmodel/db/Node.java

@@ -1253,6 +1253,11 @@ public final class Node implements INode, Serializable {
 
         boolean removed = false;
 
+        // load subnodes in case they haven't been loaded.
+        // this is to prevent subsequent access to reload the
+        // index which would potentially still contain the removed child
+        loadNodes();
+
         if (subnodes != null) {
             synchronized (subnodes) {
                 removed = subnodes.remove(node.getHandle());