RFR: 8287672: jtreg test com/sun/jndi/ldap/LdapPoolTimeoutTest.java fails intermittently in nightly run

[Rob McKenna]

Test change to silently pass if the test environment encounters a NoRouteToHostException. These are intermittent at the moment but I will attempt to find an alternative to the use of example.com in some follow up work.

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Commit messages:
 - 8281695: jtreg test com/sun/jndi/ldap/LdapPoolTimeoutTest.java fails intermittently in nightly run

Changes: https://git.openjdk.java.net/jdk/pull/8974/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8974&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8287672
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8974.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8974/head:pull/8974

PR: https://git.openjdk.java.net/jdk/pull/8974