hg: jdk/sandbox: http-client-branch: fix asFileDownload handler and add test

[chris.hegarty at oracle.com]

Changeset: c8a1eccbc719
Author:    chegar
Date:      2018-02-15 14:10 +0000
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/c8a1eccbc719

http-client-branch: fix asFileDownload handler and add test

! src/java.net.http/share/classes/jdk/internal/net/http/ResponseBodyHandlers.java
+ test/jdk/java/net/httpclient/AsFileDownloadTest.java
! test/jdk/java/net/httpclient/http2/server/Http2TestServerConnection.java