RFR: 8278961: Enable debug logging in java/net/DatagramSocket/SendDatagramToBadAddress.java

[Jaikiran Pai]

Can I please get a review for this test only change which proposes to enable debug logs from the test that failed intermittently? This change addresses https://bugs.openjdk.java.net/browse/JDK-8278961.

The change passes the (test specific) `-d` option to enable logs from that test by default. While I was at it, I even added a few more debug logs hoping it might provide some hints if/when it fails next.

For reference, a (successful) run of this test will now print something like:


----------System.out:(18/930)----------
running on OS that supports ICMP port unreachable
Testing with class java.net.DatagramSocket
tests will be run against destination address localhost/127.0.0.1 port 52682
Checking send to connected address ...
socket is locally bound to address /127.0.0.1 port 52681
received data from address /127.0.0.1 port 52681
received data from address /127.0.0.1 port 52681
received data from address /127.0.0.1 port 52681
received data from address /127.0.0.1 port 52681
received data from address /127.0.0.1 port 52681
Checking send to non-connected address ...
received data from address /127.0.0.1 port 52681
Checking send to invalid address ...
Got expected exception: java.net.PortUnreachableException
Got expected exception: java.net.PortUnreachableException
Got expected exception: java.net.PortUnreachableException
Got expected exception: java.net.PortUnreachableException
Got expected exception: java.net.PortUnreachableException

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

Commit messages:
 - 8278961: Enable debug logging in java/net/DatagramSocket/SendDatagramToBadAddress.java

Changes: https://git.openjdk.java.net/jdk/pull/6883/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6883&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8278961
  Stats: 9 lines in 1 file changed: 7 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6883.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6883/head:pull/6883

PR: https://git.openjdk.java.net/jdk/pull/6883