TT#177600 Do not expect /etc/ngcp-config/systems.cfg to exist

We have stopped generating this file, as its information is available
from network.yml.

Change-Id: I4535a9b4b376f3fa77ba57517f7588f3a2d67adf

templates/131_filesys-ngcp-pro.yaml.tt2

@@ -30,12 +30,7 @@ file:
     contains: []
 
   /etc/ngcp-config/systems.cfg:
-    exists: true
-    mode: "0644"
-    owner: root
-    group: root
-    filetype: file
-    contains: []
+    exists: false
 
   /mnt/glusterfs:
     exists: true