AETHER-2546, AETHER-2536: Fix units and add site to VCS

Change-Id: I6a0fb3d2fdc725dae671661a44a8e5c64fb2536c
diff --git a/config-models/aether-4.x/files/aether-4.0.0.tree b/config-models/aether-4.x/files/aether-4.0.0.tree
index 735ce23..e47bf9f 100644
--- a/config-models/aether-4.x/files/aether-4.0.0.tree
+++ b/config-models/aether-4.x/files/aether-4.0.0.tree
@@ -148,6 +148,7 @@
         +--rw upf?                -> /upf:upf/upf/id
         +--rw description?        at:description
         +--rw enterprise          -> /ent:enterprise/enterprise/id
+        +--rw site                -> /st:site/site/id
         +--rw sst                 at:sst
         +--rw sd                  at:sd
         +--rw slice