RFR: 8256427: Test com/sun/jndi/dns/ConfigTests/PortUnreachable.java does not work on AIX [v2]

[Christoph Langer]

> The test com/sun/jndi/dns/ConfigTests/PortUnreachable.java is not working on AIX.
> 
> It tests that when a DNS server is unreachable it fails quickly with a PortUnreachableException due to ICMP Destination Unreachable packets received and not having to wait for the full timeout interval.
> Unfortunately, on AIX such ICMP packets are not received, so the only exception cause will be the timeout. Hence, this test can't work on AIX, so it should not be executed there.
> 
> At SAP, we had this test excluded for a long time already in our private exclude list for AIX. I suggest this test update to be the final solution.

Christoph Langer has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  Test jdk/com/sun/jndi/dns/ConfigTests/PortUnreachable.java does not work on AIX

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Changes: https://git.openjdk.java.net/jdk/pull/1241/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1241&range=01
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1241.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1241/head:pull/1241

PR: https://git.openjdk.java.net/jdk/pull/1241