[9] RFR: 8048123: Replace calendars.properties with another mechanism to specify a new Japanese calendar era

[Masayoshi Okutsu]

Hello,

Please review the change for JDK-8048123. This change removes all the 
era definitions in ${java.home}/lib/calendars.properties. (The property 
file will eventually be gone later.) The major change is that any new 
era of the Japanese calendar should now be defined using new property 
"jdk.calendar.japanese.supplemental.era".

https://bugs.openjdk.java.net/browse/JDK-8048123

Webrev includes some unrelated cleanups.

http://cr.openjdk.java.net/~okutsu/9/8048123/webrev.00/

Thanks,
Masayoshi