changed branch restrictions to match the ones we use
our repo doesn't work with 3.8 correctly, so we skip the playbook tests there.
TODO: our TravisCI config also had a block to push images to our docker hub. We will need to recreate that on GA, but that should probably go in a separate PR.
TODO: our TravisCI config also had a block to push images to our docker hub. We will need to recreate that on GA, but that should probably go in a separate PR.