Comment 3 for bug 1445143

Building on top of the added test (test_cloud_config_archive), using the following breaks (the yaml can't be parsed):
        message = '''#cloud-config-archive
- content: "#cloud-config\napt_update: true\napt_upgrade: true\nchpasswd:\n expire:\
        \ false\nmanage_etc_hosts: true\npackages:\n- bzr\n- ubuntu-desktop\n- avahi-daemon\n\
        password: ubuntu\npower_state:\n mode: poweroff\n"
'''