Locations: Update Barnaul time zone
Altai Krai in Russia was moved from UTC+6 to UTC+7 in March 2016:
https://www.worldtimeserver.com/news/altai-krai-to-make-time-zone-change-on-march-27-2016/
https://en.wikipedia.org/wiki/Krasnoyarsk_Time
This affected Barnaul, which is no longer in Asia/Omsk, but now belongs to Asia/Krasnoyarsk time zone.
Edited by Dmitry Zhidenkov