Merge pull request #261 from mesosphere/taskfailure

add comment for validation cleanup

cli/dcoscli/marathon/main.py

@@ -656,6 +656,10 @@ def _clean_up_resource_definition(properties):
         if v:
             if k in ["apps", "groups"]:
                 clean_properties[k] = [_clean_up_resource_definition(v[0])]
+            # Remove fields that marathon adds. These aren’t in the json-schema
+            # because a user should not specify them. When we do a `get` to see
+            # the current schema, we may see these fields, but leaving them
+            # will cause us to unnecessarily fail the schema validation.
             elif not k.startswith("task") and k != "lastTaskFailure":
                 clean_properties[k] = v