hg: lambda/lambda/jdk: Ensure that traversal of the entry set of an unmodifiable map

[paul.sandoz at oracle.com]

Changeset: 6bb09948823e
Author:    psandoz
Date:      2013-07-05 15:52 +0200
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/6bb09948823e

Ensure that traversal of the entry set of an unmodifiable map
does not allow the setting of an entry value.

! src/share/classes/java/util/Collections.java
+ test/java/util/Collections/UnmodifiableMapEntrySet.java