tests: update ceph-ansible playbook name

The site-docker.yml.sample playbook is a symlink to the
site-container.yml.sample playbook and will be remove soon.

See ceph/ceph-ansible#5216

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit c5cfca3)

tests/tox.sh

@@ -104,7 +104,7 @@ export ANSIBLE_SSH_ARGS="-F $CEPH_ANSIBLE_SCENARIO_PATH/vagrant_ssh_config -o Co
 # runs a playbook to configure nodes for testing
 ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/tests/setup.yml --extra-vars="ceph_docker_registry=$REGISTRY_ADDRESS"
 ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/ceph-ansible/tests/functional/lvm_setup.yml
-ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/ceph-ansible/site-docker.yml.sample --extra-vars="ceph_docker_image_tag=latest-octopus ceph_docker_registry=$REGISTRY_ADDRESS fetch_directory=$CEPH_ANSIBLE_SCENARIO_PATH/fetch"
+ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/ceph-ansible/site-container.yml.sample --extra-vars="ceph_docker_image_tag=latest-octopus ceph_docker_registry=$REGISTRY_ADDRESS fetch_directory=$CEPH_ANSIBLE_SCENARIO_PATH/fetch"
 
 ansible-playbook -vv -i "$CEPH_ANSIBLE_SCENARIO_PATH"/hosts "$TOXINIDIR"/ceph-ansible/tests/functional/setup.yml