WIP: slapos_cloud: add proxy role on Item_getSubscriptionStatus

Paramers are not propagated from Instance Tree to Software Instance, as the manager does not have access to the Open Sale Order AND the customer person.

TODO: test that manageer can update customer parameters

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/Item_getSubscriptionStatus.py

+from zExceptions import Unauthorized
+if REQUEST is not None:
+  raise Unauthorized
+
 item = context
 portal = context.getPortalObject()
 

master/bt5/slapos_cloud/SkinTemplateItem/portal_skins/slapos_cloud/Item_getSubscriptionStatus.xml

@@ -50,7 +50,15 @@
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string></string> </value>
+            <value> <string>REQUEST=None</string> </value>
+        </item>
+        <item>
+            <key> <string>_proxy_roles</string> </key>
+            <value>
+              <tuple>
+                <string>Manager</string>
+              </tuple>
+            </value>
         </item>
         <item>
             <key> <string>id</string> </key>