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
Renamed vagrant examples to multinode

Now that more scenarios have been created, vagrant was renamed
to multinode to make the intent clear.
Merge pull request #21 from hogepodge/rename_vagrant_multinode

Renamed vagrant examples to multinode
Fixed Neutron database. Add Tempest on node.

Fixed Neutron database configuration.

Run Tempest from a dedicated node for multinode.
Merge pull request #22 from hogepodge/fix_neutron

Fixed Neutron database. Add Tempest on node.