RFR: 8300946: Add sun/security/provider/certpath/OCSP/OCSPNoContentLength to ProblemList

[Jamil Nimeh]

This adds the OCSPNoContentLength test recently added as part of JDK-8296343.  The test exposes what looks to be an intermittent socket closure issue in SimpleOCSPServer.  In order to take the time to solve it properly, I'd like to add this test to the problem list.

- JBS: https://bugs.openjdk.org/browse/JDK-8300946
- See also: https://bugs.openjdk.org/browse/JDK-8300939

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Commit messages:
 - Restore policy Root.java lost during merge
 - Merge with main
 - 8300946: Add sun/security/provider/certpath/OCSP/OCSPNoContentLength to ProblemList
 - Remove dead commented code
 - Throw exception directly from non 200 HTTP response codes
 - Moved SimpleOCSPServer to use CountdownLatch for ready state, updated tests
 - 8296343: CPVE thrown on missing content-length in OCSP response

Changes: https://git.openjdk.org/jdk/pull/12156/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12156&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300946
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/12156.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12156/head:pull/12156

PR: https://git.openjdk.org/jdk/pull/12156