Update module to fix errors identified by Tempest

Tempest runs on all-in-one nodes identified several problems,
including lack of support for VPNaaS, LBaaS, and default
IP Pools linked to the public network. This update fixes these
problems by:

* Adding support for LBaaS
* Adding support for VPNaaS
* Setting the default IP Pool to 'public'
* Increasing the nominal storage availbale for Cinder
* Fixing several naming inconsistencies for images
Merge pull request #20 from hogepodge/tempest_fixes

Update module to fix errors identified by Tempest