[OpenJDK 2D-Dev] RFR: 8145776: [TEST] add a test checking multipage tiff creation

[Alexander Stepanov]

Hello,

Could you please review the following fix
http://cr.openjdk.java.net/~yan/8145776/webrev.00/
for
https://bugs.openjdk.java.net/browse/JDK-8145776

Just a single test added checking the correctness of multi-page TIFF 
image creation.

Thanks,
Alexander