<i18n dev> Review Request: JDK-8193767: Improve javadoc in ResourceBundle working with modules

[mandy chung]

http://cr.openjdk.java.net/~mchung/jdk11/webrevs/8193767/

The above includes the webrev, specdiff and javadoc for this update to 
ResourceBundle, ResourceBundleProvider, and 
AbstractResourceBundleProvider to improve the documentation of 
ResourceBundles working with modules.

thanks
Mandy