RFR: 8299325: java/net/httpclient/CancelRequestTest.java fails "test CancelRequestTest.testGetSendAsync("https://localhost:46509/https1/x/same/interrupt", true, true)"

Thu Jan 26 19:45:58 UTC 2023

The CancelRequestTest has been observed failing (rare and intermittent, but at least twice) in our CI.
This fix increases the timeout waiting for resources to be released after cancelling the request, and add more diagnosis to the test code.

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Commit messages:
 - 8299325

Changes: https://git.openjdk.org/jdk/pull/12233/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12233&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299325
  Stats: 36 lines in 1 file changed: 20 ins; 1 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/12233.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12233/head:pull/12233

PR: https://git.openjdk.org/jdk/pull/12233