
After the recent change, the job now fails since ruamel.yaml is not installed. Change the job to use tox to install dependency. This creates a new tox environment that is then called from the proposal script. Failure log: http://logs.openstack.org/periodic/git.openstack.org/openstack-infra/project-config/master/propose-project-config-update/bf68ac6/ Change-Id: I02ce33f10d388531806380f464dacc5617c74f1f