[COOK-2954] Support Installing non-standard versions on CentOS 6
[COOK-2954] Support Installing non-standard versions on CentOS 6

Signed-off-by: Sean OMeara <4025b808ec3cf11e3d5c9a1a3bd1e7c4003cb3a1@opscode.com>

yakara-ltd/postgresql,jayceeb/chef-postgresql,inetsys/postgresql,clearstorydata/chef-postgresql,jharveysmith/postgresql,h4ck3rm1k3/postgresql,GitBytes/postgresql,dwashko/chef-postgresql,inetsys/postgresql,dwashko/chef-postgresql,eheydrick/postgresql,Unholster/postgresql,hw-cookbooks/postgresql,GitBytes/postgresql,patcon/postgresql,pronix/postgresql,rastasheep/postgresql,rastasheep/postgresql,gsaslis/postgresql,livepy/postgresql,dguenms/postgresql,jayceeb/chef-postgresql,dguenms/postgresql,sous-chefs/postgresql,patcon/postgresql,pronix/postgresql,hw-cookbooks/postgresql,ozzyogkush/postgresql,ozzyogkush/postgresql,wearefuturegov/postgresql,NREL-cookbooks/postgresql,yakara-ltd/postgresql,eheydrick/postgresql,sous-chefs/postgresql,clearstorydata/chef-postgresql,thomas88/postgresql,Unholster/postgresql,clearstorydata/chef-postgresql,NREL-cookbooks/postgresql,h4ck3rm1k3/postgresql,CloCkWeRX/postgresql,chiemi627/postgresql,livepy/postgresql,chiemi627/postgresql,gsaslis/postgresql,wearefuturegov/postgresql