DevStack support

Deploy DevStack 1 + 3 nodes. Configure each node stack user .ssh to have ssh between nodes without a password. On controller: ssh-keygen -t rsa -P "" cat ./.ssh/id_rsa.pub >> ./.ssh/authorized_keys chmod 600 ~/.ssh/authorized_keys Then copy .ssh content to each node. Clone Doctor under stack user in the controller node. Test like normal: sudo -E tox -e py36  These are required to be included to local.conf on the controller to run both TEST_CASE maintenance and fault_management: enable_plugin heat https://git.openstack.org/openstack/heat enable_plugin ceilometer https://git.openstack.org/openstack/ceilometer enable_plugin aodh https://git.openstack.org/openstack/aodh enable_plugin gnocchi https://github.com/openstack/gnocchi enable_plugin fenix https://opendev.org/x/fenix master enable_service fenix-engine enable_service fenix-api disable_service ceilometer-acompute