Rearange array of test cases in MwTimeIsoFormatter tests

This is a prerequisit for one of my following patches. The reason
for the change is that neither the original ISO time stamp nor the
formatted time can be used as a unique key. It must be possible to
have two slightly different input strings that result in the same
output (e.g. "+2014" and "+000000002014" should be formatted as
"2014") as well as an input that results in two different outputs
(if the precision is different).

This patch does not add, removes or changes tests.

Change-Id: Ib1057f988b97d05b10db01e95c24000fbc43c56e
Merge "Rearange array of test cases in MwTimeIsoFormatter tests"