hg: jdk/sandbox: http-client-branch: use UTF-8 for all convertions to String

[chris.hegarty at oracle.com]

Changeset: 96c1f6e984eb
Author:    chegar
Date:      2018-02-05 19:01 +0000
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/96c1f6e984eb

http-client-branch: use UTF-8 for all convertions to String

! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/Http2Connection.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/frame/FramesDecoder.java
! src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/internal/frame/GoAwayFrame.java