Merge branch 'Preseed-config' into 'master'

set time/zone to ETC/UTC

See merge request !1086

infra/station/debian/preseed.cfg

@@ -146,7 +146,7 @@ d-i clock-setup/utc boolean true
 
 # You may set this to any valid setting for $TZ; see the contents of
 # /usr/share/zoneinfo/ for valid values.
-d-i time/zone string Europe/Amsterdam
+d-i time/zone string Etc/UTC
 
 # Controls whether to use NTP to set the clock during the install
 d-i clock-setup/ntp boolean true