The Airship project is switching from the OpenInfra Individual
Contributor License Agreement to the Developer Certificate of
Origin, which requires that commit messages include a Signed-Off-By
trailer. Any commits generated by automated tooling will need to
comply with this requirement as well. Simply including git commit's
-s option on the command line should be sufficient to meet this
requirement.
Change-Id: I6d62c35d580fb9d7f68c36a3cde51043eb568490
b7084237ec