If an osbuild or koji-osbuild job has failed, add
a check to see if it is a result of the build jobs
dependencies and return the dependency failure job
error furthest up the chain of errors & add this
error to the details filed of the build job error.
I think it's a natural fit, they access some fields from the server so let's
find a new home for them there.
Signed-off-by: Ondřej Budai <ondrej@budai.cz>