[jdk17] RFR: 8268776: Test `ADatagramSocket.java` missing /othervm from @run tag

[Patrick Concannon]

Hi,

Could someone please review my change to the test `test/jdk/java/net/DatagramSocket/SetDatagramSocketImplFactory/ADatagramSocket.java`? The test is missing `/othervm` from its @run jtreg test tag, which risks polluting other tests that run in that VM.

Currently, any test that runs without `/othervm` after this test would find the `DatagramSocketImpl` factory created by this test, and therefore any call made to new `DatagramSocket()` would return/use a `NetMulticastSocket` instead of `DatagramSocketAdaptor`. This could make tests that create `DatagramSocket`/`MulticastSocket` fail intermittently in unexplainable ways. Adding in `/othervm` to the @run tag will avoid this problem.

Kind regards,
Patrick

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Commit messages:
 - 8268776: Test `ADatagramSocket.java` missing /othervm from @run tag

Changes: https://git.openjdk.java.net/jdk17/pull/75/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=75&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268776
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/75.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/75/head:pull/75

PR: https://git.openjdk.java.net/jdk17/pull/75