Added a test for IETF BCP 47 language tag string parsing.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1552063 13f79535-47bb-0310-9956-ffa450edef68
Merge from the JDK7 branch, ignoring the new test case since the feature is unsupported on the JDK6 branch.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK6@1552066 13f79535-47bb-0310-9956-ffa450edef68