Add "__version__" as a meta field
Add "__version__" as a meta field

Formbuilder introduces a new metadata field in the result of the API data
endpoint called "__version__" we want to add this to our metadata fields.
We therefore now have fields containing `:name "__version__"`
being considered meta fields.

Signed-off-by: Njagi Mwaniki <b6a4ba60ad861b9c9afb6daea7294be4be68f44c@urbanslug.com>

onaio/hatti,onaio/hatti