Use new docker tags in Travis.yml
The docker tags in taurus-test docker image have been updated. Now
debian-{jessie,stretch,buster}
are used insted, while "debian9" and
"latest" should no longer be used. Modify travis.yml accordingly.
The docker tags in taurus-test docker image have been updated. Now
debian-{jessie,stretch,buster}
are used insted, while "debian9" and
"latest" should no longer be used. Modify travis.yml accordingly.