uploader: field definitions enhancement

Acked-by: Jiri Kuncar <jiri.kuncar@cern.ch>
jsonalchemy: dirty fix for default values

* FIXME Find a better way to set the default values.

Acked-by: Jiri Kuncar <jiri.kuncar@cern.ch>
records: fix typo in the API

Signed-off-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
workflows: fix for registry keygetter

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
uploader: removal of empty workflows

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>