hg: lambda/lambda/jdk: Whitelist StringBuffer public methods not supposed to be synchronized.

[mike.duigou at oracle.com]

Changeset: 5ef1cea8f006
Author:    henryjen
Date:      2013-01-11 11:28 -0800
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/5ef1cea8f006

Whitelist StringBuffer public methods not supposed to be synchronized.
Move StringJoinerTest.java to use jtreg test harness.

- test-ng/tests/org/openjdk/tests/java/util/StringJoinerTest.java
! test/java/lang/StringBuffer/TestSynchronization.java
+ test/java/util/StringJoinerTest.java