[master] Initial changes for https://java.net/jira/browse/GRIZZLY-1570 (ServletRequest.getLocales() and BCP47 style Language tags.)
(cherry picked from commit be8e41df223bc4d176c1e1fd37d7a467ca4f7bae)
[master] + fix issue #1569
https://java.net/jira/browse/GRIZZLY-1569

"High priority findbugs warning produced with introduction of ConcurrentHashMapV8"
[master] + make ConcurrentHashMapV8 package private