[COOK-3685] Upgrade Repo Attributes for Postgresql 9.3

- Adds pgdg yum repo attributes for rhel based systems for 9.3
- Enhances pgdg yum repo attributes for newer 9.2 packages

Further information can be found here:  http://yum.postgresql.org/repopackages.php#pg93

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
[COOK-3717] Support apt.postgresql.org version specific packages.
[COOK-3717] Don't rely on meta-packages to install the right packages version on Debian/Ubuntu
[COOK-3717] Update PGDG yum repository data
[COOK-3717] Add debian-7.1.0 platform to kitchen
[COOK-3717] Test PGDG repositories with PostgreSQL version 9.3