AETHER-2837 support subnet in Application filter

Change-Id: I5c8e3b3b0ab73cf8e9223fd754519bf46a673746
diff --git a/config-models/aether-2.0.x/files/yang/onf-application.yang b/config-models/aether-2.0.x/files/yang/onf-application.yang
index 31aa19d..d8eb9d1 100755
--- a/config-models/aether-2.0.x/files/yang/onf-application.yang
+++ b/config-models/aether-2.0.x/files/yang/onf-application.yang
@@ -51,7 +51,7 @@
       uses at:desc-display-name;
 
       leaf address {
-        type ietf:host;
+        type at:host-or-network;
         mandatory true;
         description
             "Address of this application. Either a hostname, an IP, or a subnet.";