hg: jdk9/sandbox/jdk: http-client-branch: revert part of my previous fix. MultiResponseProcessor::onRequest says "It is an error to not return a valid {@code BodyProcessor} for the initial (main) request."

[daniel.fuchs at oracle.com]

Changeset: 333733abead8
Author:    dfuchs
Date:      2016-08-31 17:14 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/333733abead8

http-client-branch: revert part of my previous fix. MultiResponseProcessor::onRequest says "It is an error to not return a valid {@code BodyProcessor} for the initial (main) request."

! src/java.httpclient/share/classes/java/net/http/PushGroup.java