[8u60] Request for Approval: 8081813: JSONListAdapter should delegate its [[DefaultValue]] to wrapped object

[Attila Szegedi]

Please approve.

Bug: https://bugs.openjdk.java.net/browse/JDK-8081813 <https://bugs.openjdk.java.net/browse/JDK-8081813>
jdk9 webrev: http://cr.openjdk.java.net/~attila/ <http://cr.openjdk.java.net/~attila/>8081813/webrev.jdk9 <http://cr.openjdk.java.net/~attila/8081813/webrev.jdk9>
jdk8u-dev webrev: http://cr.openjdk.java.net/~attila/8081813/webrev.jdk8u-dev <http://cr.openjdk.java.net/~attila/8081813/webrev.jdk8u-dev>
jdk9 and 8u-dev joint review thread: http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-June/004667.html <http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-June/004667.html>

The changeset differs between 8u-dev and 9; the reviewers reveiwed both versions in the above thread.

Thanks,
  Attila.