[qa] QA Office Hour New Time: 0 UTC

Hello Everyone, Please note the QA office hour new time which is 0 UTC(which will include the Asia TZ members also) on every Thursday. I have updated the wiki page [1] also for that. I have cleaned up the PING LIST which was old, feel free to add yourself in the PING list on wiki if you want the IRC notification. [1] https://wiki.openstack.org/wiki/Meetings/QATeamMeeting#Agenda_for_next_Offic... -gmann