Merge branch 'erp5-component' into erp5
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.
KVM SR: update pinned egg versions.
KVM SR: export: use new slapos.toolbox qemu qmp wrapper.
KVM SR: resilient: add backend_url promise.

It will force the connection parameters to bubble up to reach the user.
Resilient stack: add promise for ssh key presence of PBS in root instanec.
KVM SR: resilience test: update md5 of disk image.
KVM SR: update egg versions.
Merge branch 'erp5-component' into erp5
Merge branch 'erp5'
Merge branch 'master' into erp5-component