ogcp: add backup boolean field in image update

User can use this boolean field to specify if an backup copy needs to be
created before updating an image.

This only applies when sending a request to a client (ogClient)
supporting this parameter.

ogcp/forms/action_forms.py

@@ -152,6 +152,7 @@ class ImageUpdateForm(FlaskForm):
     ip = HiddenField()
     os = SelectField(label=_l('Partition'), choices=[])
     image = SelectField(label=_l('Image'), choices=[])
+    backup = BooleanField(label=_l('Backup'))
     update = SubmitField(label=_l('Update'))
 
 

ogcp/views.py

@@ -1186,6 +1186,7 @@ def action_image_update():
                    'name': image['name'],
                    'repository': repository['ip'],
                    'id': str(image['id']),
+                   'backup': form.backup.data,
                    # Dummy parameters, not used by ogServer on image update.
                    'group_id': 0,
                    'center_id': 0}