Rebase postgresql to puppetlabs-postgresql-4.0.0

Rebases to puppetlabs-postgresql commit id:
5d4a543a54df0c9c52a5c7c1f68e5ae51d862947

Older postgresql lacks capability to handle
bindir path changes in postgres 9.0 and newer.

Change-Id: If8265bcdd7144a44b97a9f2e7d72f8a4b263920a
Partial-Bug: #1386118
Related blueprint merge-openstack-puppet-modules
Merge "Rebase postgresql to puppetlabs-postgresql-4.0.0"