Remove centrally managed themes from the updates

Remove centrally managed themes from the update manager.

Related to DRUPAL-141.

cern_integration.module

@@ -21,6 +21,13 @@ function cern_integration_update_projects_alter(&$projects)
             }
         }
     }
-}
-
 
+    // Remove all centrally managed themes.
+    foreach (system_get_info("theme") as $theme_name => $theme) {
+        if (preg_match('#^themes/#', drupal_get_path("theme", $theme_name))) {
+            if (isset($theme["project"])){
+                unset($projects[$theme["project"]]);
+            }
+        }
+    }
+}