CMS: primary dataset metadata update

* Updates CMS Primary Datasets records metadata.
  (addresses #89 #333 #154 #91 #223) (PR #362)
records: new record data model fields

* Adds new record fields to the data model and amends some existing ones
  to reflect changes in CMS Primary Datasets.  (see PR #362)

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
templates: reflect new CMS Primary Datasets fields

* Amends CMS Primary Datasets templates in order to adapt to new and
  amended metadata fields.  (see PR #362)

* NOTE Does basic amendments only so that there would be no traceback;
  the templates need further amendments to display proper information.

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>