RFR: 8068: Move JMC 9 to JDK 17 [v4]

[Brice Dutheil]

> This PR builds atop #359 which has a number of improvement.
> * #359
> 
> It removed older platform that didn't support Java17 (see https://wiki.eclipse.org/Eclipse/Installation).
> 
> I didn't changed the agent to 17 though.

Brice Dutheil has updated the pull request incrementally with two additional commits since the last revision:

 - Drop the no-jfr profile as it was fixing an OpenJDK 8 problem
   
   Removes
   * 9cd0bd723e32a60662524e215dc6c32d690f98a3
   * 40700cefb625903266bab50cd46497de826409e8
 - Enforce JDK 17

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

Changes:
  - all: https://git.openjdk.org/jmc/pull/482/files
  - new: https://git.openjdk.org/jmc/pull/482/files/8dfdcd4e..f3b9be91

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=482&range=03
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=482&range=02-03

  Stats: 16 lines in 2 files changed: 0 ins; 14 del; 2 mod
  Patch: https://git.openjdk.org/jmc/pull/482.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/482/head:pull/482

PR: https://git.openjdk.org/jmc/pull/482