RFR: 8321401: GenShen: Each mutator must see FullGC before throwing OOM [v3]

[Kelvin Nilsen]

> Require each thread to observe unproductive Full GC before it throws OOM exception.

Kelvin Nilsen has updated the pull request incrementally with one additional commit since the last revision:

  Remove ShenandoahNoProgressThreshold
  
  With this change, this command-line option has no effect.

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Changes:
  - all: https://git.openjdk.org/shenandoah/pull/365/files
  - new: https://git.openjdk.org/shenandoah/pull/365/files/6d6f16db..bbff38a3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=shenandoah&pr=365&range=02
 - incr: https://webrevs.openjdk.org/?repo=shenandoah&pr=365&range=01-02

  Stats: 5 lines in 1 file changed: 0 ins; 5 del; 0 mod
  Patch: https://git.openjdk.org/shenandoah/pull/365.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/365/head:pull/365

PR: https://git.openjdk.org/shenandoah/pull/365