Update debmirror package list for Ubuntu

* Drop 'text' section from exclude;
* Drop exclude for ubuntu libvirt (live migration may
  not work with latest libivrt);
* Add update-notifier-common;
* Add localization package krb5 required for curl

Change-Id: Icbf222b63bd0028eb480fe73ad638286b56ebfad
Related-Prod: PROD-30102
2 files changed