hg: jdk/sandbox: Use DiffieHellman rather than the DH alias

[xuelei.fan at oracle.com]

Changeset: afb358e14f29
Author:    xuelei
Date:      2018-05-24 11:34 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/afb358e14f29

Use DiffieHellman rather than the DH alias

! src/java.base/share/classes/sun/security/ssl/CookieExtension.java
! src/java.base/share/classes/sun/security/ssl/DHClientKeyExchange.java
! src/java.base/share/classes/sun/security/ssl/DHKeyExchange.java