Integrated: 7904077: IDEA plugin: Plugin crashes when using newest Ant plug

[Jorn Vernee]

The jtreg plugins calls some methods from the ant plugin configuration classes. In the newest version of the ant plugin, one of these methods has been removed:

https://github.com/JetBrains/intellij-community/commit/265fee5a6e051d9d8f49403d48c5694a557e522c

This causes the jtreg plugin to crash with a NoSuchMethodError, and running tests is no longer possible. 

The fix proposed by this patch is to use the `Project` instance we get from the jtreg configuration instance. They should point to the same object.

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Commit messages:
 - Update version and notes
 - Don't use removed AnyConfigurationBase::getProject

Changes: https://git.openjdk.org/jtreg/pull/288/files
  Webrev: https://webrevs.openjdk.org/?repo=jtreg&pr=288&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7904077
  Stats: 8 lines in 2 files changed: 2 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jtreg/pull/288.diff
  Fetch: git fetch https://git.openjdk.org/jtreg.git pull/288/head:pull/288

PR: https://git.openjdk.org/jtreg/pull/288