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 think we have discussed in the past with @suenjedt @espacial *et al* that DOI identifiers should be namespace agnostic, i.e. *not* having any sub-collection notion inside?  This would call for using `10.7483/OPENDATA.A342.9982`...