new attribute file to support pgdg rhel package locations, depricate version older than 9.2
new attribute file to support pgdg rhel package locations, depricate version older than 9.2

Unholster/postgresql,patcon/postgresql,sous-chefs/postgresql,GitBytes/postgresql,hw-cookbooks/postgresql,sous-chefs/postgresql,Unholster/postgresql,GitBytes/postgresql,patcon/postgresql,hw-cookbooks/postgresql,yakara-ltd/postgresql,yakara-ltd/postgresql