Indicator menu does not use clock format for times in other locations

[stuart d]

Times for other locations that are shown in the menu are not formatted the same way that the indicator menu bar clock is formated.

To reproduce (from the default config):

1. Go to Time & Date Settings -> Clock
2. Select "In the clock, show: 24-hour time"
3. Check "Time in other locations"
4. Add a location under "Choose Locations". I entered UTC. Note that the formatting is correctly used here.
5. Exit configuration windows

Expected result: UTC time would be shown in menu with 24-hour format

Actual result: UTC time is shown in menu using 12-hour format

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Paul Robinson (funwithlibelium)]

I experience this problem in Ubuntu 16.04 LTS.

Please note that it also appears in this askubuntu question,

http://askubuntu.com/questions/493725/24h-time-format-not-applied-on-other-locations

where it is purported that it is a regression from 12.04 (which works correctly) to 14.04 (which doesn't). I haven't confirmed that statement.