in fedora postgresql is the service name and postgresql-server is
the package.[1]
os: Fedora release 23 (Twenty Three)
psql: psql (PostgreSQL) 9.4.5
i'm not entirely sure when this changed, but it's devstack is broken
in above environment.
[1]https://fedoraproject.org/wiki/PostgreSQL
Change-Id: Id940fed2a777ca469ce77402e1136251ba572359