Use release.sh helper from prow-tests image#1622

Merged

google-prow-robot merged 3 commits intoknative:masterfrom

adrcunha:simpler-release-sh

Jul 21, 2018

Commits on Jul 19, 2018

Commits on Jul 20, 2018

Merge branch 'master' into simpler-release-sh
adrcunha
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