MP1-4427 : MPEI fix on refresh to avoid KnownExtensions.xml to grow up an each update.
MP1-4427 : Revert previous commit and correct analyze of old 'oldpak' to avoid size growing up
Merge remote-tracking branch 'remotes/origin/MP1-4427-BUG-KnownExtensions.xml_increases_in_size_when_refresh_update_info_is_run_in_MPEI'