[KVM SR] Update eggs versions.
fixup! KVM: convert kvm instance profile to jinja2.
[KVM SR] publish nat rules as parameters.
[Resilient stack] Allow to define complete backup periodicity.

In cron format.
[KVM SR] Update kvm resiliency test to follow resiliency parameter format change.
[Resilient stack] Increase number of kept backups to 2 weeks.