[9] RFR: 8159501: ShortRSAKey512.java intermittently times out

[Artem Smotrakov]

Hello,

Please review the patch below for 
javax/net/ssl/TLSv12/ShortRSAKey512.java test.

The test has been seen to fail intermittently with a time out. I was not 
able to reproduce this failure. The test fails with "Client died ..." 
message which occurs in case of exception on client side. But no 
exception is printed, so it is not clear why it fails.

The test runs a client in a separate thread, and save an exception on 
client side if it occurs. Then, it waits for server to finish before 
print an exception on client side. The server waits for a client 
connection forever. As a result, the test fails by timeout, and no 
exception is printed to output.

The patch updates the test with the following:
- print out exceptions when they occur, and enabled SSL/TLS debug 
output, so that we'll have more info if it fails next time
- start new threads as daemons, so that it doesn't need to wait for test 
timeout is reached
- use try-with-resources
- removed unnecessary "throw" and "try-catch" blocks

Webrev: http://cr.openjdk.java.net/~asmotrak/8159501/webrev.00/
Bug: https://bugs.openjdk.java.net/browse/JDK-8159501

Artem