hg: amber/amber/jdk: Automatic merge with default

[maurizio.cimadamore at oracle.com]

Changeset: 634a0bcece02
Author:    langtools
Date:      2017-04-22 02:56 +0200
URL:       http://hg.openjdk.java.net/amber/amber/jdk/rev/634a0bcece02

Automatic merge with default

- test/java/net/MulticastSocket/JoinGroup.java
- test/java/net/MulticastSocket/Leave.java