RFR: 8161203: ResourceBundle.getBundle performance regression

[Masayoshi Okutsu]

Hi,

Please review the fix for JDK-8161203. The fix is to lazily load 
ResourceBundleProviders. It's not necessary to load providers before 
cache look-up.

Issue:
https://bugs.openjdk.java.net/browse/JDK-8161203

Webrev:
http://cr.openjdk.java.net/~okutsu/9/8161203/webrev.01

Thanks,
Masayoshi