This fix the real location of the log after use logrotate stack.

  Simple Don't repeat yourself.

resilient: adds a promise to test integrity and the status of the last run of the feeds generated by notifier scripts

This commit is a fix for 8787716d. It allows to get the random cron string
generated previously through parameters, and not reading manually .installed.cfg.

The more there is data to backup, the more likely something can go wrong.
Running the exporter script several times will copy less and less things
at each run, so it should increase the probability to succeed.

This solution is better than adding a sleep in a crontab, because it will be a new
date every day

Revert "resilient: new paramater to define the time to sleep before running the backup in the cron job."

This reverts commit 30d1a937.

Default is a random value between 0 and 6 hours. KVM and Slaprunner test instances set it at 0.

Also deploy takeover script only in import instances. This is non-sense to deploy it on export/pbs instances.

In cron format.

Resilient stack: define different ssh/httpd ports from pbs, import and export. Allow to have import/export using same IP.

So that we publish ony once, not twice.

This is a squash merge of 'resiliency-testing' branch when
the HEAD of this branch was f725c81d7d69.

The merge was done by Antoine Catton.