[COOK-3553] Remove apt-get update

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
[COOK-3611] Fix Postgresql::ruby on ubuntu/debian and fix config for 9.3

Signed-off-by: Seth Vargo <sethvargo@gmail.com>
Merge branch 'master' of github.com:opscode-cookbooks/postgresql

Conflicts:
	attributes/default.rb