RFR: 8286729: G1: Calculation to fit in optional region in remaining pause time wrong

[Thomas Schatzl]

Hi all,

  can I have reviews for this fix to the calculation to fit in optional regions into the current incremental collection set?

The change fixes multiple consideration of the recently selected regions in the current available time.

Testing: tier1-5, gha

Thanks,
  Thomas

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Commit messages:
 - initial version

Changes: https://git.openjdk.java.net/jdk/pull/8722/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8722&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8286729
  Stats: 5 lines in 1 file changed: 1 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8722.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8722/head:pull/8722

PR: https://git.openjdk.java.net/jdk/pull/8722