Firewall: standardize usage on ufw module
ufw: remove ufw module

It ships with Ansible
cleanup horizon tasks
logging: UFW task name
Merge pull request #586 from blueboxgroup/ufw-module

Firewall: standardize usage on ufw module
Clean up nova-data role

names, whitespace, logic changes, failed_when.
nova libvirt: fix lvopts
Further fix libvirtd_opts

Since there were double quotes inside the string, the whole thing needed
to be wrapped in single quotes instead. Quoting is hard, but this time
it was tested locally before committing.