RFR: 8260862 JFR: New configure command for the jfr tool [v2]

[Erik Gahlin]

> Hi,
> 
> Could I have a review of a new configure command for the jfr tool. Purpose is to simplify changing event settings:
> 
> $ jfr configure method-profiling=high gc=detailed
> Configuration written successfully to:
> 
> 
> For more details, see CSR:
> https://bugs.openjdk.java.net/browse/JDK-8260863
> 
> Testing: 
> - jdk/jdk/jfr
> - JMC recording wizard
> 
> Thanks
> Erik

Erik Gahlin has updated the pull request incrementally with two additional commits since the last revision:

 - Review feedback
 - Fix copyright and formatting

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3100/files
  - new: https://git.openjdk.java.net/jdk/pull/3100/files/3a95d908..78f1df90

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3100&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3100&range=00-01

  Stats: 947 lines in 40 files changed: 475 ins; 430 del; 42 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3100.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3100/head:pull/3100

PR: https://git.openjdk.java.net/jdk/pull/3100