[11] Review Request - JDK-8170026: Some tests in RegionBackgroundFillUITest fail with fractional window scale

[Rajath Kamath]

Hi Kevin, Murali,

Please review this fix for skipping  specific tests when run on systems with 
fractional scale factor set.

JBS : https://bugs.openjdk.java.net/browse/JDK-8170026 

WebRev : http://cr.openjdk.java.net/~rkamath/8170026/webrev.00/ 


Thanks,
Rajath