RFR(XXS) : [8u20] : 8038931 : [TESTBUG] Several regression tests fail to compile in JDK 8u20 nightly build

[Igor Ignatyev]

Hi all,

Please review the patch:

problem:
- import statement is forgotten during backporting
- assertSame uses fail method which hasn't been backported to 8u20 yet

fix:
- added import j.u.Objects statement
- replaced 'fail(str)' by 'throw new RE(str)'

webrev: http://cr.openjdk.java.net/~iignatyev/8038931/webrev.00/
jbs: https://bugs.openjdk.java.net/browse/JDK-8038931
testing: failing tests
-- 
Igor