Comment 5 for bug 1448066

For all releases >= 6.1 - there is no chance that deployment will succeed without tasks present in database.
By default we are always trying to upload tasks to nailgun db during bootstrap/upgrade of the Fuel master, but sometimes
bootstrap is done manually and/or artifacts that affects tasks lookup are changed (example: version in /etc/puppet/release).

That will lead to failed deployment - with hidden root cause, and that will confuse many people. So in order to help with debugging/troubleshotting - my suggestion is to add necessary validation as stated in https://bugs.launchpad.net/fuel/+bug/1448066/comments/2