Tests for IPAddress and VLANID

Change-Id: If8183366428c9b4fb14f78005922b2229cff1456
diff --git a/utils/misc/src/main/java/org/onlab/packet/VLANID.java b/utils/misc/src/main/java/org/onlab/packet/VLANID.java
index c978e52..d2a09fa 100644
--- a/utils/misc/src/main/java/org/onlab/packet/VLANID.java
+++ b/utils/misc/src/main/java/org/onlab/packet/VLANID.java
@@ -7,9 +7,9 @@
 
     private final short value;
     // Based on convention used elsewhere? Check and change if needed
-    private static final short UNTAGGED = (short) 0xffff;
+    public static final short UNTAGGED = (short) 0xffff;
     // A VLAN ID is actually 12 bits of a VLAN tag.
-    private static final short MAX_VLAN = 4095;
+    public static final short MAX_VLAN = 4095;
 
     protected VLANID() {
         this.value = UNTAGGED;