RFR: 8281739: JFR: Use message with Objects.requireNonNull

[Erik Gahlin]

Hi,

Could I have review of an enhancement that adds the parameter name when checking Objects.requireNonNull.

Testing: jdk/jdk/jfr 

Thanks
Erik

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Commit messages:
 - Fix bug
 - Remove whitespace
 - Cleaner
 - Remove whitespace
 - Initial

Changes: https://git.openjdk.java.net/jdk/pull/7553/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7553&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8281739
  Stats: 82 lines in 16 files changed: 18 ins; 2 del; 62 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7553.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7553/head:pull/7553

PR: https://git.openjdk.java.net/jdk/pull/7553