cinder-volume: gaurd creation
cinder-volume: Additional error checking
Refactor cinder volume group task
Fix regression in migrate_neutron_services
Merge pull request #455 from blueboxgroup/fix-migrate-neutron-services

Fix regression in migrate_neutron_services
Merge pull request #440 from blueboxgroup/cleanup-cinder-role

cinder-volume: guard creation
Configure dnsmasq to send IPv6 RA for other nodes

This configuration is dependent on the controller nodes having IPv6
forwarding enabled and static IPv6 addresses, but will enable using
SLAAC for other compute nodes.