Cleanup LBaaS(haproxy) and VPNaaS(OpenSwan) processes

It is required to stop these processes to remove netns successfully
Use cirros-0.3.1 image by default
Enable Q_USE_DEBUG_COMMAND
devstack-cleaner.sh: compress logs
Add po-file-update.sh
Enable LOG_COLOR by default
localrc: Add q-fwaas
devstack-cleaner.sh: add nova-api cleanup temporarily
Misc files backup