This allows Cinder to be used with PostgreSQL.
Requires the puppetlabs/postgresql module. NOTE: I did add this
dependency to fixtures but did not add it to the Modulefile due
to the fact that the postgresql::python module hasn't been
released to puppetforge yet (although it is committed and tests
pass).
Change-Id: I3522d50935c81c8859c9f597df64aa0af6ca4e71
