[threeten-dev] test/java/time/test/java/util/TestFormatter fails in UTC Tz

[Xueming Shen]

http://cr.openjdk.java.net/~sherman/jdk8_threeten/juf.utc/

The  toZoneIdStr(...), which returns the "expected" result, need update to not
replace the GMT/UTC/UT to 'Z', as these ids are no longer normalized to 'Z'.

I also added the UTC/GMT/UT-ed tzd, so the test failure can be caught earlier
in any env.

-Sherman