FasterXML#2442: Use ArrayNode#add in ArrayNode#addAll to handle raw null adds.

Author: heshamMassoud

src/main/java/com/fasterxml/jackson/databind/node/ArrayNode.java

@@ -316,7 +316,9 @@ public ArrayNode addAll(ArrayNode other)
      */
     public ArrayNode addAll(Collection<? extends JsonNode> nodes)
     {
-        _children.addAll(nodes);
+        for (JsonNode node : nodes) {
+            add(node);
+        }
         return this;
     }