Update CMS primary data sets

Addressing issues: https://github.com/cernopendata/opendata.cern.ch/issues/89 https://github.com/cernopendata/opendata.cern.ch/issues/333 https://github.com/cernopendata/opendata.cern.ch/issues/154 https://github.com/cernopendata/opendata.cern.ch/pull/91#discussion_r17281750
https://github.com/cernopendata/opendata.cern.ch/issues/223
I don't mind what we do with the field just a final decision would be nice as I touched this field for the 4th time already. Having a $a Data or Software is fine with me.