Include ssh and hotline ports in the iptables-nmap test case

These ports are valid services that should be running in the images.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>

test-cases/iptables-nmap.yaml

@@ -19,14 +19,17 @@ metadata:
     - "The external computer must be connected to the same network as the target."
 
   expected:
-    - "All ports are filtered, except port 80/tcp (http) which is closed. The
-      script should report 'pass'"
+    - "All ports are filtered, except port 80/tcp (http)/closed,
+       22/tcp (ssh)/open, and 1234/tcp (hotline)/close. The script should also
+       report 'pass' at the end."
     - |
         >Not shown: 999 filtered ports
         PORT   STATE  SERVICE
-        80/tcp closed http
+        22/tcp   open   ssh
+        80/tcp   closed http
+        1234/tcp closed hotline
         ....
-        TEST_RESULT:only_http_80_closed:pass
+        TEST_RESULT:only_valid_services:pass
 
   notes:
     - "Make sure that you have disconnect the ethernet connection to the target