hg: jdk/sandbox: Eliminate need to cache traffic class

[alan.bateman at oracle.com]

Changeset: 766140c67efa
Author:    alanb
Date:      2019-04-21 07:05 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/766140c67efa

Eliminate need to cache traffic class

! src/java.base/share/classes/java/net/Socket.java
! src/java.base/share/classes/sun/nio/ch/NioSocketImpl.java
! src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java
! test/jdk/java/net/SocketOption/OptionsTest.java