added IPAddress construct

Change-Id: Idc57a22b568b33503c78254222d52fbfc19b0b72
diff --git a/core/api/src/main/java/org/onlab/onos/net/host/DefaultHostDescription.java b/core/api/src/main/java/org/onlab/onos/net/host/DefaultHostDescription.java
index c3653e6..2acdc75 100644
--- a/core/api/src/main/java/org/onlab/onos/net/host/DefaultHostDescription.java
+++ b/core/api/src/main/java/org/onlab/onos/net/host/DefaultHostDescription.java
@@ -6,7 +6,7 @@
 import java.util.Set;
 
 import org.onlab.onos.net.HostLocation;
-import org.onlab.packet.IPv4;
+import org.onlab.packet.IPAddress;
 import org.onlab.packet.MACAddress;
 
 import com.google.common.collect.ImmutableSet;
@@ -16,14 +16,14 @@
     private final MACAddress mac;
     private final short vlan;
     private final HostLocation location;
-    private final Set<IPv4> ips;
+    private final Set<IPAddress> ips;
 
     public DefaultHostDescription(MACAddress mac, short vlan,
-            HostLocation loc, Set<IPv4> ips) {
+            HostLocation loc, Set<IPAddress> ips) {
         this.mac = mac;
         this.vlan = vlan;
         this.location = loc;
-        this.ips = new HashSet<IPv4>(ips);
+        this.ips = new HashSet<IPAddress>(ips);
     }
 
     @Override
@@ -42,7 +42,7 @@
     }
 
     @Override
-    public Set<IPv4> ipAddresses() {
+    public Set<IPAddress> ipAddresses() {
         return ImmutableSet.copyOf(ips);
     }