build: fail Travis if commit message check fails
"Allowed to fail" tests are easy to miss. With the failure on Travis, new contributors can learn our commit guidelines. Collaborators are still allowed (per our current policy) to land PRs where this check fails, as long as the warnings are fixed before pushing to master.
Signed-off-by: Matheus Marchini mmarchini@netflix.com
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines