Dhcp option 82 deserializer should set 'data' field when deserializing sub-options.

Change-Id: Ie01a9d07200dd3cfd1c07d502f75cbc5c420b90d
diff --git a/utils/misc/src/main/java/org/onlab/packet/dhcp/DhcpRelayAgentOption.java b/utils/misc/src/main/java/org/onlab/packet/dhcp/DhcpRelayAgentOption.java
index 08f488d..b3c073f 100644
--- a/utils/misc/src/main/java/org/onlab/packet/dhcp/DhcpRelayAgentOption.java
+++ b/utils/misc/src/main/java/org/onlab/packet/dhcp/DhcpRelayAgentOption.java
@@ -88,6 +88,7 @@
             ByteBuffer byteBuffer = ByteBuffer.wrap(data, offset, length);
             relayOption.code = byteBuffer.get();
             relayOption.length = byteBuffer.get();
+            relayOption.data = data;
 
             while (byteBuffer.remaining() >= DEFAULT_LEN) {
                 byte subOptCode = byteBuffer.get();