They are dependencies of slapos.toolbox and we already agreed to put slapos.toolbox version in a shared file.

/cc @jerome @jm

/reviewed-on nexedi/slapos!502

this is a followup of nexedi/slapos!427

/reviewed-on nexedi/slapos!431

monitor: move scripts wrapper and logrotate conf to buildout, uses some new promises from slapos.toolbox

monitor was updated in slapos.toolbox to not generate promise launcher scripts anymore. All
generated scripts are now in buildout.
Monitor promise run script is removed from cron, slapgrid is used to run promises.
Replace some old promises by the new ones from slapos.toolbox. Cleanup monitor configuration.
Monitor report and monitor-promises directory are now obsolete.

If we don't specify MaxRequestWorkers, it seems like Apache 2.4
errors with:
AH03490: scoreboard is full, not at MaxRequestWorkers. Increase
ServerLimit.
Maybe because MaxRequestWorkers then defaults to a too high value
compared to ServerLimit and ThreadsPerChild.

/reviewed-on nexedi/slapos!263

Added password generation and monitoring to jupyter instances. Todo: Password editing at the monitor.

A redo of [this](nexedi/slapos!148) merge request. I messed up with some merge conflicts on the old one and thought it would be faster to make a new one...

@alain.takoudjou  @Tyagov 

/reviewed-on nexedi/slapos!156

  Move instance-monitor.cfg to buildout.hash.cfg

When a process is stopped:
- it may not have emitted logs since previous rotation: add "missingok"
  As a direct consequence: stop using logrotate recipe.
- its pid file (if applicable) may be missing: test its non-empty presence
  before calling slapos-kill
Also, stop using slapos.cookbook:logrotate.
Update obvious users (cloudooo, neoppod, erp5, monitor, re6stnet).