Fix examples for specifying usage of official postgresql repos

This changes the wording and name of the example for using
yum|apt.postgresql.org as the source of your packages.

Signed-off-by: Ken Barber <ken@bob.sh>

tests/official-postgresql-repos.pp

@@ -1,23 +1,19 @@
 # This manifest shows an example of how you can use a newer version of
-# postgres from yum.postgresql.org, rather than your system's
+# postgres from yum.postgresql.org or apt.postgresql.org, rather than your
-# default version.
+# system's default version.
 #
 # Note that it is important that you use the '->', or a
 # before/require metaparameter to make sure that the `params`
 # class is evaluated before any of the other classes in the module.
 #
-# Also note that this example includes automatic management of the yumrepo
+# Also note that this example includes automatic management of the yumrepo or 
-# resource.  If you'd prefer to manage the repo yourself, simply pass 'false'
+# apt resource.  If you'd prefer to manage the repo yourself, simply pass
-# or omit the 'manage_repo' parameter--it defaults to 'false'.  You will still
+# 'false' or omit the 'manage_repo' parameter--it defaults to 'false'.  You will
-# need to use the 'params' class to specify the postgres version
+# still need to use the 'postgresql' class to specify the postgres version
 # number, though, in order for the other classes to be able to find the
 # correct paths to the postgres dirs.
-
-
 class { "postgresql":
     version               => '9.2',
     manage_package_repo   => true,
-    package_source        => 'yum.postgresql.org',
 }->
-
 class { "postgresql::server": }