cmdlib.sh: add env var to sleep before killing tail
#3792
Merged
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I can't reproduce this locally, but I have a suspicion that
tailcan exit too quickly in some circumstances, causing truncated output:openshift/os#1498 (comment)
#3785 (comment)
Rather than having an unconditional
sleep, let's make it easier to test that theory by having an env var we can use to make it optional. Then we'll test that in CI.Mid-term, I'd like to revert 79b15c8 soon so we can go back to virtio-serial which is just so much cleaner.