I just saw in the trace output of a failure
> grep -o 'CentOS-.[^>]*GenericCloud-.[^>]*.qcow2'
> sort -r
> head -1
sort: fflush failed: 'standard output': Broken pipe
sort: write error
i.e. the "head -1" has exited after reading one line, but "sort -r"
still wants to write and thus has hit a pipe failure, and because we
run with "-o pipefail" this has halted the script.
This seems like it has been there more or less forever, maybe we just
got lucky hitting it now? Anyway, we can work around this by using a
process substitution and passing the output of this into head, this
way we won't hit a pipe failure.
I also updated the fedora path as it does the same thing.
Change-Id: I44d97e5bb31702aacf396e0229329a2ef9c64f2f
5bc9e87da1