hg: jdk6/jdk6/jdk: 7071826: Avoid benign race condition in initialization of UUID

[sean.coffey at oracle.com]

Changeset: 563d392b3e5c
Author:    mduigou
Date:      2012-05-25 20:02 +0100
URL:       http://hg.openjdk.java.net/jdk6/jdk6/jdk/rev/563d392b3e5c

7071826: Avoid benign race condition in initialization of UUID
Summary: Avoids mostly benign but sometimes expensive race condition on initialization of UUID.numberGenerator which is used by UUID.randomUUID()
Reviewed-by: alanb, chegar

! src/share/classes/java/util/UUID.java
! test/java/util/UUID/UUIDTest.java