hg: jdk9/sandbox/jdk: http-client-branch: fixed minor issues in AuthenticationFilter which were triggered when a server rejected credentials after a password change. Added a new MultiAuthTest to verify the fix.

[daniel.fuchs at oracle.com]

Changeset: b8fa10f3af73
Author:    dfuchs
Date:      2016-08-24 18:07 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/b8fa10f3af73

http-client-branch: fixed minor issues in AuthenticationFilter which were triggered when a server rejected credentials after a password change. Added a new MultiAuthTest to verify the fix.

! src/java.httpclient/share/classes/java/net/http/AuthenticationFilter.java
+ test/java/net/httpclient/MultiAuthTest.java