[jdk11u-dev] RFR: 8268776: Test `ADatagramSocket.java` missing /othervm from @run tag

[Aleksey Shipilev]

Clean backport to match `11.0.13-oracle`.

Additional testing:
 - [x] Affected test still passes

-------------

Commit messages:
 - Backport 7d7bdbe135018f1452fa133b294575014e3e871b

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/226/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=226&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/jdk11u-dev/pull/226.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/226/head:pull/226

PR: https://git.openjdk.java.net/jdk11u-dev/pull/226