Merge "Updating Jinja filters to conform to Ansible 2.5+"

ansible/roles/cinder/tasks/precheck.yml

ansible/roles/haproxy/tasks/precheck.yml

ansible/roles/horizon/handlers/main.yml

ansible/roles/keystone/tasks/precheck.yml

ansible/roles/mariadb/tasks/lookup_cluster.yml

ansible/roles/neutron/handlers/main.yml

ansible/roles/opendaylight/handlers/main.yml

ansible/roles/openvswitch/handlers/main.yml

ansible/roles/ovs-dpdk/handlers/main.yml

ansible/roles/prechecks/tasks/package_checks.yml

ansible/roles/prechecks/tasks/service_checks.yml

ansible/roles/prechecks/tasks/user_checks.yml

ansible/roles/rabbitmq/tasks/bootstrap.yml