Cause: The packaging didn't handle upgrading from grizzly/quantum to havana/neutron well.
Consequence: Config files were not migrated, the quantum and neutron users had the same UID causing sudo/rootwrap issues, and neutron services that were enabled in grizzly would not be enabled after upgrading to havana.
Fix: Add upgrade handling post upgrade
Result: Upgrades happen more smoothly fron quantum to neutron. After doing a yum update, the user should only have to migrate the database and start the neutron services.