[11] RFR: 8197829: Optimize CLDRCalendarDataProviderImpl::retrieveInteger

[Claes Redestad]

Hi,

please review this improvement to the retrieveInteger method in 
CLDRCalendarDataProviderImpl.

Bug: https://bugs.openjdk.java.net/browse/JDK-8197829
Webrev: http://cr.openjdk.java.net/~redestad/8197829/jdk.00/

This deals with a tiny startup regression that appeared in 10+36 on some 
applications and systems[1]

Thanks!

/Claes

[1] Likely due to https://bugs.openjdk.java.net/browse/JDK-8190918