7015410: test/java/net/Socks/SocksProxyVersion.java needs to be updated due to 7013420

[Alan Bateman]

Joe pushed the changes to jdk7/tl/langtools a few days ago to remove the 
general expression support from the try-with-resources statement. Looks 
like one networking test was missing with the result that it no longer 
compiles with a build of jdk7/tl.  Chris - can you review? It's a test 
you added only very recently. The webrev is here:
  http://cr.openjdk.java.net/~alanb/7015410/webrev/

-Alan