RFR: 8277814: ConcurrentRefineThread should report rate when deactivating [v2]

[Kim Barrett]

> Please review this change to the logging by concurrent refinement threads.
> This change adds the cards processed per ms to the deactivation log message.
> 
> Testing:
> mach5 tier1
> locally ran a test with gc+refine=debug logging enabled and verified the
> expected change to the deactivation log message.

Kim Barrett has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into crt_inactive_log
 - log refinement rate

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6550/files
  - new: https://git.openjdk.java.net/jdk/pull/6550/files/b623710c..b1efd950

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6550&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6550&range=00-01

  Stats: 4009 lines in 144 files changed: 2477 ins; 1027 del; 505 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6550.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6550/head:pull/6550

PR: https://git.openjdk.java.net/jdk/pull/6550