No longer check for pg_master attribute

since it's not actually being used here.  Instead, this cookbook expects
the presence of the `.pgpass` file if pg_enabled is set to true

Signed-off-by: Jesse Szwedko <j.szwedko@modcloth.com>
Adding upstart conf file check to spec

And setting pg_enabled to true.

Signed-off-by: Jesse Szwedko <j.szwedko@modcloth.com>