Relies on the host having a dict with appropriate values defined,
for example:
wordpress_blogs:
- site_name: blah.com
wordpress_version: 3.9.2
wordpress_db_user: db_user
wordpress_db_name: db_name
wordpress_db_pass: V9&XvvKu1hYl
Signed-off-by: Alan Orth <alan.orth@gmail.com>