Merge "Usage of kolla_container_engine variable instead of docker"

ansible/group_vars/all.yml

ansible/roles/bifrost/tasks/bootstrap.yml

ansible/roles/bifrost/tasks/deploy-servers.yml

ansible/roles/bifrost/tasks/reconfigure.yml

ansible/roles/bifrost/tasks/stop.yml

ansible/roles/common/handlers/main.yml

ansible/roles/designate/tasks/update_pools.yml

ansible/roles/hacluster/tasks/bootstrap_service.yml

ansible/roles/ironic/tasks/upgrade.yml

ansible/roles/keystone/tasks/distribute_fernet.yml

ansible/roles/keystone/tasks/register.yml

ansible/roles/keystone/tasks/register_identity_providers.yml

ansible/roles/loadbalancer/tasks/precheck.yml

ansible/roles/mariadb/handlers/main.yml

ansible/roles/mariadb/tasks/check.yml

ansible/roles/mariadb/tasks/lookup_cluster.yml

ansible/roles/mariadb/tasks/recover_cluster.yml

ansible/roles/mariadb/tasks/restart_services.yml

ansible/roles/monasca/tasks/bootstrap.yml

ansible/roles/murano/tasks/import_library_packages.yml