[13] RFR: CONFIG level logging statements printed in CLDRCalendarDataProviderImpl.java even when default log Level is INFO

[Naoto Sato]

Hello,

Please review the fix to the following issue:
https://bugs.openjdk.java.net/browse/JDK-8218960

The proposed changeset is located at:

http://cr.openjdk.java.net/~naoto/8218960/webrev.00/

The CONFIG message was generated because CLDRCalendarDataProviderImpl 
was returning null for locales without region. Use "US" as the default 
region in such a case.

Naoto