[12]RFR of JDK-8210407:Refactor java.util.Calendar:i18n shell tests to plain java tests

[Ying Zhou]

Hello,

test/java/util/Calendar/SupplementalJapaneseEraTest.sh
test/java/util/Calendar/GenericTimeZoneNamesTest.sh
test/java/util/Calendar/NarrowNamesTest.sh

Please review this patch to refactor above shell script tests to java.

Bug: https://bugs.openjdk.java.net/browse/JDK-8210407

Webrev: http://cr.openjdk.java.net/~dzhou/8210407/webrev.00/ 
<http://cr.openjdk.java.net/%7Edzhou/8210407/webrev.00/>

Thanks,

Daisy