[7u-dev] Request for approval : CR 7196533 : TimeZone.getDefault() slow due to synchronization bottleneck

[Seán Coffey]

Requesting to port this change back from jdk8 to jdk7u-dev. 7u fix has 
been reviewed by Masayoshi.

bug ID : http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7196533
review thread : 
http://mail.openjdk.java.net/pipermail/i18n-dev/2013-January/000885.html
webrev : http://cr.openjdk.java.net/~coffeys/webrev.7196533.7u/
regards,
Sean.