hg: lambda/lambda/jdk: Fix issues with CHM:

[paul.sandoz at oracle.com]

Changeset: 291a872e1763
Author:    psandoz
Date:      2013-07-05 10:04 +0200
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/291a872e1763

Fix issues with CHM:
- Stack overflow when find entries in tables with lots of
forwarding nodes
- Iteration ecountering less elements due to encountering
unexpected forwarding nodes created when resizing
- more use of volatile to be on the conservative side
Contributed-by: Doug Lea <dl at cs.oswego.edu>

! src/share/classes/java/util/concurrent/ConcurrentHashMap.java