Implement NDP-related classes

* Resolve ONOS-511
* Refactor: Move NDP-related classes into org.onlab.packet.ndp package
* Bugfix: payload is not properly set in testSerialize

Change-Id: Idb2dbfbd0297152c0e26ac2d5d5f8dba62824660
diff --git a/utils/misc/src/main/java/org/onlab/packet/ndp/package-info.java b/utils/misc/src/main/java/org/onlab/packet/ndp/package-info.java
new file mode 100644
index 0000000..443cce0
--- /dev/null
+++ b/utils/misc/src/main/java/org/onlab/packet/ndp/package-info.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Utilities for decoding and encoding packets of Neighbor Discovery Protocol
+ * for IPv6 (RFC 4861).
+ */
+package org.onlab.packet.ndp;