Fix Upgrade Error with no Administrators Group

Fix Upgrade Error with no Administrators Group

Upgrade fails if Administrators group has been deleted.

- Check for Administrato(via ADMIN_GROUP_ID) and if it does not exist do
  not add it to permissions list
Merge branch 'fix_deleted_admin_group_5622_upgrade_fail'

Conflicts:
	web/concrete/helpers/concrete/upgrade/version_5622.php