RFR(S) 8197453 : Add support of extra problem list

[Ekaterina Pavlova]

Hi all,

ProblemList.txt files used by makefiles for jtreg testing allow to specify list of tests to be excluded
from execution on all or specific platforms. However to test such features like Graal we want to be able
to specify list of failed tests which fail in particular JVM mode only.
  
Please review this change which adds support of extra problem list and introduces 2 Graal specific problem list files.
- test/hotspot/jtreg/ProblemList-graal.txt
- test/jdk/ProblemList-graal.txt


      JBS: https://bugs.openjdk.java.net/browse/JDK-8197453
   webrev: http://cr.openjdk.java.net/~epavlova//8197453/webrev.00/
  testing: precheckin, tier1 and tier2 with empty EXTRA_PROBLEM_LISTS.
           testing in Graal mode with EXTRA_PROBLEM_LISTS=ProblemList-graal.txt

thanks,
-katya

p.s.
  Igor Ignatyev volunteered to sponsor this change.