BibReformat: chunking of updated records query
BibReformat: chunking of updated records query

* Instead of a single sql query for updated records, we split it
  in multiple ones with a limit of 5000 records per query.

BibReformat: bug fix

* Prod and master differ in their format for bibrank_start_date
  This patches is to handle the difference between branches

inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio