Fix postgis so it installs the approprate RHEL5 package.

In RHEL5 the package was just named 'postgis' in the external repos,
rather than postgis$package_version.

manifests/globals.pp

@@ -92,7 +92,7 @@ class postgresql::globals (
   }
 
   $default_postgis_version = $globals_version ? {
-    '8.1' => '1.5',
+    '8.1' => '1.3.6',
     '8.4' => '1.5',
     '9.0' => '1.5',
     '9.1' => '1.5',

manifests/params.pp

@@ -63,9 +63,11 @@ class postgresql::params inherits postgresql::globals {
 
       $postgis_package_name = pick(
         $postgis_package_name,
-        versioncmp($postgis_version, '2') ? {
-          '-1'    => "postgis${package_version}",
-          default => "postgis2_${package_version}",
+        $::operatingsystemrelease ? {
+          /5/     => 'postgis',
+          default => versioncmp($postgis_version, '2') ? {
+            '-1'    => "postgis${package_version}",
+            default => "postgis2_${package_version}",}
         }
       )
     }