RFR: JMC-7156: [JFR Writer] Allow providing extra recording settings

[Jaroslav Bachorik]

JMC-7156: [JFR Writer] Allow providing extra recording settings

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Commit messages:
 - JMC-7156: [JFR Writer] Allow providing extra recording settings

Changes: https://git.openjdk.java.net/jmc/pull/223/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmc&pr=223&range=00
  Issue: https://bugs.openjdk.java.net/browse/JMC-7156
  Stats: 251 lines in 7 files changed: 238 ins; 1 del; 12 mod
  Patch: https://git.openjdk.java.net/jmc/pull/223.diff
  Fetch: git fetch https://git.openjdk.java.net/jmc pull/223/head:pull/223

PR: https://git.openjdk.java.net/jmc/pull/223