Use CKAN tags as POD keyword

[inghamn]

It would be nice to have a predefined wrapper for the PDO keyword field. CKAN ships with a tagging system, and it would be nice to not have to do double entry for tags.

[kvuppala]

@inghamn keywords defined in POD schema are already stored as CKAN tags. Ex: https://catalog.data.gov/dataset/gsa-it-policy-archive-zip

Is the commit for the data json export ?

CC: @alex-perfilov-reisys

[theresaanna]

Can this be closed?