Implementing region hosts for topology 2

Change-Id: I6d1e45b1152b2387d4ff981dc0666868235eb1c3
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2Jsonifier.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2Jsonifier.java
index e895214..9e4beb6 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2Jsonifier.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2Jsonifier.java
@@ -387,7 +387,8 @@
                 .put("id", region.idAsString())
                 .put("name", region.name())
                 .put("nodeType", REGION)
-                .put("nDevs", region.deviceCount());
+                .put("nDevs", region.deviceCount())
+                .put("nHosts", region.hostCount());
         // TODO: complete closed-region details
 
         addMetaUi(node, region.idAsString());