Run DesktopDb plugin before the AppStream plugin

src/plugins/gs-plugin-desktopdb.c

@@ -66,7 +66,7 @@ gs_plugin_initialize (GsPlugin *plugin)
 gdouble
 gs_plugin_get_priority (GsPlugin *plugin)
 {
-	return 5.0f;
+	return 0.9f;
 }
 
 /**