RFR: JDK-8074406 DateTimeFormatter.appendZoneOrOffsetId() fails to resolve a ZoneOffset for OffsetDateTime

[Xueming Shen]

Stephen and Roger,

This is the DTF.appendZoneOrOffsetId() issues we discussed last year. Somehow the
ball was dropped somewhere :-)

Here is the proposed change we discussed. The only difference is I leave the ZoneOffset
to throw the DateTimeException, instead of inside the Parsed.query() directly.

I also updated the TCKZoneIdPrinterParser to (1) add the appendZoneOrOffsetId() (it appears
we don't have any corresponding test cases for it) and (2) return a ZoneOffset for "offset"
if there is indeed a ZoneOffset inside the parsed.

Issue: https://bugs.openjdk.java.net/browse/JDK-8074406
webrev: http://cr.openjdk.java.net/~sherman/8074406/webrev

Thanks!
-Sherman