Use apt_update_skip in disable-services module

Author: guysoft

src/modules/disable-services/start_chroot_script

@@ -9,7 +9,7 @@ set -ex
 source /common.sh
 install_cleanup_trap
 
-apt-get update --allow-releaseinfo-change --allow-releaseinfo-change
+apt_update_skip
 if [ $( is_in_apt policykit-1 ) -eq 1 ]; then
   apt-get -y install policykit-1
 fi