[jdk16u] RFR: 8261758: [TESTBUG] gc/g1/TestGCLogMessages.java fails if ergonomics detect too small InitialHeapSize

[Christoph Göttschkes]

8261758: [TESTBUG] gc/g1/TestGCLogMessages.java fails if ergonomics detect too small InitialHeapSize

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Commit messages:
 - Clean backport of JDK-8261758.

Changes: https://git.openjdk.java.net/jdk16u/pull/32/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=32&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261758
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/32.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/32/head:pull/32

PR: https://git.openjdk.java.net/jdk16u/pull/32