RFR: Incorporate feedback from reviewers

[William Kemper]

This PR incorporates changes made in response to https://github.com/openjdk/jdk/pull/14185

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

Commit messages:
 - Simplify test logic, fail if name of Shenandoah young gen pool changes (#3)
 - Assert bounds only when allocations succeed, increase test timeouts (#2)
 - Make the order of young/old collector checks consistent (#1)
 - Fix budgeting assertion to allow equal or greater than
 - Remove a few more unneeded copyright notices
 - JDK-8309322: [GenShen] TestAllocOutOfMemory#large failed
 - Remove more extraneous copyright notices
 - Remove one more extraneous Amazon copyright
 - Update copyright notices
 - Improve efficiency of card-size alignment calculations
 - ... and 6 more: https://git.openjdk.org/shenandoah/compare/57fdc186...7348eda4

Changes: https://git.openjdk.org/shenandoah/pull/285/files
 Webrev: https://webrevs.openjdk.org/?repo=shenandoah&pr=285&range=00
  Stats: 900 lines in 42 files changed: 37 ins; 839 del; 24 mod
  Patch: https://git.openjdk.org/shenandoah/pull/285.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/285/head:pull/285

PR: https://git.openjdk.org/shenandoah/pull/285