wrong path detection for postgres conf_dir and conf_path

[atomic111]

Description

I am using postgres.conf_path in my inspec profiles. If i use it for centos 7.2 i get the following

You are currently running on: OS family: centos OS release: 7.2.1511 inspec > postgres.conf_path => "/var/lib/pgsql/data/postgresql.conf"

The path should be /var/lib/pgsql/9.4/data/postgresql.conf

This applies also for oracle.

InSpec and Platform Version

inspec version 0.27.0

Replication Case

I used this centos vm http://opscode-vm-bento.s3.amazonaws.com/vagrant/virtualbox/opscode_centos-7.2_chef-provisionerless.box

Possible Solutions

add a new section for centos and redhat os family in lib/resources/postgres.rb