Trivial: Fix the pep8 warning

The yaml should start with "---"

Change-Id: Idc217ee0d4409360c0763779acadf21d39206ff7

examples/playbook.yml

@@ -1,3 +1,4 @@
+---
 - name: Basic LXC host setup
   hosts: "hosts"
   user: root

tasks/lxc_apparmor.yml

@@ -1,3 +1,4 @@
+---
 # Copyright 2018, SUSE LINUX GmbH.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tasks/lxc_install_dnf.yml

@@ -1 +1,2 @@
+---
 lxc_install_yum.yml

tests/ansible-role-requirements.yml

@@ -1,3 +1,4 @@
+---
 - name: apt_package_pinning
   src: https://git.openstack.org/openstack/openstack-ansible-apt_package_pinning
   scm: git

zuul.d/project.yaml

@@ -1,3 +1,4 @@
+---
 # Copyright 2017, Rackspace US, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");