remove ceilo from devstack: https://review.openstack.org/#/c/196383/
grenade plugin for ceilo: https://review.openstack.org/#/c/196441/
add grenade and devstack plugins to infra job: https://review.openstack.org/#/c/196446/
remove ceilo from grenade: https://review.openstack.org/#/c/196448/
try to get the grenade plugin working with the devstack plugin: https://review.openstack.org/#/c/202203/