RFR: 8259349: -XX:AvgMonitorsPerThreadEstimate=1 does not work right

[Daniel D.Daugherty]

This is a trivial fix to make the "-XX:AvgMonitorsPerThreadEstimate"
option work correctly for values < 1024.

I've locally built and tested this fix on my MBP13. It will be included in my
next Mach5 Tier[1-3] testing batch.

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Commit messages:
 - 8259349: -XX:AvgMonitorsPerThreadEstimate=1 does not work right
 - 8259397: ThreadsSMRSupport::print_info_on() should use try_lock_without_rank_check()

Changes: https://git.openjdk.java.net/jdk/pull/1992/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1992&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259349
  Stats: 13 lines in 3 files changed: 8 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1992.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1992/head:pull/1992

PR: https://git.openjdk.java.net/jdk/pull/1992