RFR: 8370955: Remove test javax/management/remote/mandatory/connection/ConnectionTest.java from ProblemList-Virtual

[Kevin Walls]

This test was problemlisted, like several tests that were occasionally hanging on Windows when used with virtual threads.

This test looks reliable now. Key change may have been JDK-8282726.

Trivially remove from problem list.

(this is the last of these changes I have)

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Commit messages:
 - 8370955: Remove test javax/management/remote/mandatory/connection/ConnectionTest.java from ProblemList-Virtual

Changes: https://git.openjdk.org/jdk/pull/28063/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28063&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8370955
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28063.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28063/head:pull/28063

PR: https://git.openjdk.org/jdk/pull/28063