[OpenJDK 2D-Dev] [9] RFR JDK-8164750: TIFF reading fails when ignoring metadata with BaselineTIFFTagSet removed

[Brian Burkhalter]

Please review at your convenience:

Issue:  https://bugs.openjdk.java.net/browse/JDK-8164750
Patch:  http://cr.openjdk.java.net/~bpb/8164750/webrev.00/

Currently if ignoreMetadata == true and the set of allowed TIFFTagSets does not 
contain the BaselineTIFFTagSet instance then image reading will fail as fields 
essential to reading and interpreting the data will be ignored.

Thanks,

Brian