Improve test stability

Under some circumstances, Canada/Newfoundland (UTC -03:30)
can not be found as answer in tests. This patch improves
stability here by using cities with the same distances to
UTC and UTC DST.

Fixes bug 1184901

Change-Id: I7d5739a7c7a504c22cceebeaa3331637993e34ae
Merge "Improve test stability"