RFR (T) 8218399: runtime/RedefineObject/TestRedefineObject.java timeout

[coleen.phillimore at oracle.com]

Summary: exclude this test for graal

open webrev at http://cr.openjdk.java.net/~coleenp/2019/8218399.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8218399

See bug report for more details.  Tested that it's not run with:
mach5 remote-build-and-test -b macosx-x64-debug --job hs-tier4-graal

Thanks,
Coleen