[8u] RFR 8134672: [TEST_BUG] Some tests should check isDisplayChangeSupported

[Zhengyu Gu]

I would like to backport this patch to 8u for parity with Oracle 8u301.

The original bug: https://bugs.openjdk.java.net/browse/JDK-8134672
The original patch: https://hg.openjdk.java.net/jdk/jdk/rev/af678f2593e2

The original patch does not apply cleanly to 8u. The only conflict is 
copyright year.

8u webrev: http://cr.openjdk.java.net/~zgu/JDK-8134672-8u/webrev.00/

Test:
   Test passed on Linux x86_84

Thanks,

-Zhengyu