<i18n dev> RFR: 8152077: (cal) Calendar.roll does not always roll the hours during daylight savings changes

[Masayoshi Okutsu]

Hello,

Please review the fix for JDK-8152077. There's a bug in the roll method 
around the standard/daylight saving time transitions. I've changed the 
implementation to perform the "roll" operation based on the wall-clock 
time rather than the UTC time (the offset from the Epoch).

Issue:
https://bugs.openjdk.java.net/browse/JDK-8152077

Webrev:
http://cr.openjdk.java.net/~okutsu/9/8152077/webrev.00/

Thanks,
Masayoshi