This commit ensures that we test the correct branches of Docker when making packaging changes. Signed-off-by: Dave Tucker <dt@docker.com> (cherry picked from commit 1ef9fb3f0b2b8016b50c6c71f2d14bea16faff35) Upstream-commit: 5e59ff8a5e8ea44444aa4f22a8baf12e091bcc76 Component: packaging