AETHER-2837 support subnet in Application filter

Change-Id: I5c8e3b3b0ab73cf8e9223fd754519bf46a673746
diff --git a/config-models/aether-2.0.x/files/aether-2.0.0.tree b/config-models/aether-2.0.x/files/aether-2.0.0.tree
index 0065ab6..808e65b 100644
--- a/config-models/aether-2.0.x/files/aether-2.0.0.tree
+++ b/config-models/aether-2.0.x/files/aether-2.0.0.tree
@@ -20,7 +20,7 @@
         |  +--rw application-id    application-id
         |  +--rw display-name?     string
         |  +--rw description?      description
-        |  +--rw address           ietf:host
+        |  +--rw address           at:host-or-network
         |  +--rw endpoint* [endpoint-id]
         |     +--rw endpoint-id      yg:yang-identifier
         |     +--rw display-name?    string
@@ -153,3 +153,4 @@
               +--rw subnet           inet:ipv4-prefix
               +--rw admin-status?    at:admin-status
               +--rw mtu?             at:mtu
+