RFR: 8334297: (so) java/nio/channels/SocketChannel/OpenLeak.java should not depend on SecurityManager

[Daniel Fuchs]

The test java/nio/channels/SocketChannel/OpenLeak.java depends on the SecurityManager to trigger an exception in SocketChannel::connect.

This change rewrites it to connect to a TCP reserved port instead, such as port 47, 51, or 61, in order to trigger a `ConnectException` instead of a `SecurityException`.

The original issue that this test tried to check for was:
https://bugs.openjdk.org/browse/JDK-6548464

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Commit messages:
 - 8334297

Changes: https://git.openjdk.org/jdk/pull/19723/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19723&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334297
  Stats: 30 lines in 1 file changed: 22 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/19723.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19723/head:pull/19723

PR: https://git.openjdk.org/jdk/pull/19723