[STORY] LNG adoption

[chibenwa]

• Reduce TTL of jmap.linagora.com, tmail.linagora.com tmail-canary.linagora.com dav.linagora.com etc.. (15 minutes)
• Register calendar.linagora.com + contacts.linagora.com + accounts.linagora.com + tcalendar.linagora.com in CNAME imap.linagora.com
• Add calendar.linagora.com + contacts.linagora.com + accounts.linagora.com in NGINX VHOST on imap.linagora.com
• Copy NGINX conf of jmap.linagora.com on imap.linagora.com
• Stop esn + sabre on jmap.linagora.com
• Snapshot data on jmap.linagora.com and restore it on imap.linagora.com
• Start sabre and the side service on imap.linagora.com
• Switch domain names from jmap.linagora.com to imap.linagora.com
• Redirect openpaas.linagora.com/calendar to calendar.linagora.com