hg: jdk9/client/jdk: 8153208: TIFFImageReadParam: should "contains()" check be appropriate for addAllowedTagSet() method?

[brian.burkhalter at oracle.com]

Changeset: cdde8f59b6b5
Author:    bpb
Date:      2016-11-15 08:58 -0800
URL:       http://hg.openjdk.java.net/jdk9/client/jdk/rev/cdde8f59b6b5

8153208: TIFFImageReadParam: should "contains()" check be appropriate for addAllowedTagSet() method?
Summary: Do not add a duplicate TIFFTagSet instance and update the spec accordingly.
Reviewed-by: prr

! src/java.desktop/share/classes/javax/imageio/plugins/tiff/TIFFImageReadParam.java