views: Display error if software inventory are not available

Display an error if the user tries to view software inventory but it is
yet not available

ogcp/views.py

@@ -805,6 +805,10 @@ def action_software():
         server = get_server_from_clients(ips)
         r = server.get('/client/setup', payload={'client': list(ips)})
 
+        if not r.json()['partitions']:
+            flash(_('Software inventory is not available. Boot client in ogLive mode to obtain it'), category='error')
+            return redirect(url_for('commands'))
+
         for part in r.json()['partitions'][1:]:
             form.os.choices.append(
                 (f"{part.get('disk')} {part.get('partition')}",