RFR: 8248162: serviceability/attach/RemovingUnixDomainSocketTest.java failed

[Alex Menkov]

JDK-8258917 fixed non-java launchers ("wrong launcher" VM warning for tools).
The fix un-problemlists RemovingUnixDomainSocketTest and changes serviceability tests to use OutputAnalyzer.stderrShouldBeEmptyIgnoreDeprecatedWarnings instead of stderrShouldBeEmptyIgnoreVMWarnings

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Commit messages:
 - JDK-8248162

Changes: https://git.openjdk.java.net/jdk/pull/2438/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2438&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8248162
  Stats: 11 lines in 7 files changed: 0 ins; 2 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2438.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2438/head:pull/2438

PR: https://git.openjdk.java.net/jdk/pull/2438