CORD-1951: Remove obsolete files; replace header.py with symlink

Change-Id: I9fae39ff3b65e67ed0896b0ba2eae752dba82a77
(cherry picked from commit d599f2ed84d11de1f7e4e96958ea703291611542)
diff --git a/xos/vee.m4 b/xos/vee.m4
index 43dab8c..414dab8 100644
--- a/xos/vee.m4
+++ b/xos/vee.m4
@@ -32,21 +32,11 @@
         properties:
             xos_base_props
             xos_base_service_props
-            backend_network_label:
-                type: string
-                required: false
-                description: Label that matches network used to connect HPC and BBS services.
-            dns_servers:
-                type: string
-                required: false
-            node_label:
-                type: string
-                required: false
 
     tosca.nodes.VEEServiceInstance:
         derived_from: tosca.nodes.Root
         description: >
-            A VEE Tenant.
+            A VEE Service Instance.
         properties:
             xos_base_tenant_props
             s_tag: