RFR: JDK-8325743: test/jdk/java/nio/channels/unixdomain/SocketOptions.java enhance user name output in error case [v2]

[Matthias Baesken]

> In case of a bad running LDAP we got this output from test test/jdk/java/nio/channels/unixdomain/SocketOptions.java
> 
> java.lang.RuntimeException: wrong username
> at SocketOptions.testPeerCred(SocketOptions.java:75)
> at SocketOptions.main(SocketOptions.java:52)
> at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
> at java.base/java.lang.reflect.Method.invoke(Method.java:580)
> at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
> at java.base/java.lang.Thread.run(Thread.java:1583)
> 
> It would be better to see the compared values (user name data we compare) and get them in the exception output.

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  adjust output and header

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17829/files
  - new: https://git.openjdk.org/jdk/pull/17829/files/19e7a9b6..f7366970

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17829&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17829&range=00-01

  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/17829.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17829/head:pull/17829

PR: https://git.openjdk.org/jdk/pull/17829