RFR: 8342175: MemoryEaterMT fails intermittently with ExceptionInInitializerError

[Aleksey Shipilev]

See issue for more bread-crumbs. I think this is generally a test bug for vmTestbase GC tests that run on the brink of OOME. `MemoryEaterMT` intermittently fails with Shenandoah and G1 on our machines. So I believe we should fix this as testbug.

Additional testing:
 - [x] Linux AArch64 server fastdebug, `MemoryEaterMT` with `-XX:+UseShenandoahGC`, 10x, now passes 
 - [x] Linux AArch64 server fastdebug, `MemoryEaterMT` with default (G1) GC, 10x, now passes
 - [ ] Linux AArch64 server fastdebug, `all` with default (G1) GC, still passes

-------------

Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/28531/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28531&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342175
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28531.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28531/head:pull/28531

PR: https://git.openjdk.org/jdk/pull/28531