Leverage more of the new JDK7 capabilities for parsing Locale.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1551835 13f79535-47bb-0310-9956-ffa450edef68
Merge from the JDK7 branch, with adaptation for non-existant API on JDK6.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK6@1551838 13f79535-47bb-0310-9956-ffa450edef68