[jdk11u-dev] RFR: 8238677: java/net/httpclient/ssltest/CertificateTest.java should not specify TLS version

[Goetz Lindenmaier]

I downport this for parity with 11.0.13-oracle.
Applies clean except for deleting the keystore files.

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Commit messages:
 - Backport fbca3fa710d8068e39eee574813c35f1d60fabe5

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/395/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=395&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8238677
  Stats: 365 lines in 7 files changed: 304 ins; 28 del; 33 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/395.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/395/head:pull/395

PR: https://git.openjdk.java.net/jdk11u-dev/pull/395