Resiliency: add promises about presence of public-key parameter value.
KVM SR: resilient test: don't wait for URL to be present.

We need a real-world simulation, not a wrold where the user is constantly clicking on 'update' for 2 hours.
KVM SR: add missing option in input json schema.
KVM SR: resilient root instance: add promise to check for url parameter validity.
Release slapos.cookbook-0.84.2.