[11u] RFR: 8225430: Replace wildcard address with loopback or local host in tests - part 14

[Lindenmaier, Goetz]

Hi

I would like to downport this for parity with 11.0.7-oracle.

I added a missing import to
java/net/URLClassLoader/closetest/CloseTest.java
The import was introduced in 14 in a change not
downported to 11.

http://cr.openjdk.java.net/~goetz/wr20/8225430-wildcard_loopback_14-jdk11/01/
https://bugs.openjdk.java.net/browse/JDK-8225430
https://hg.openjdk.java.net/jdk/jdk/rev/70f5cbb711a9

Best regards,
  Goetz.