Load max 5 pages of each type in FirstFetchStep2 and clone it

To avoid too long FirstFetchStep2 jobs, at max 5 pages of each type
(closed issues, closed prs, events, issues comments, prs comments), and
then the job is cloned to work on the next batch (with a pause of 60
secondes)
It also allow the users to see some data for each types and not all
closed issues, then all closed prs...