net_probe socket should be closed in any case

network verification fails if started 2 times in a row
with exception Socket error: Address already in use - bind(2)

Change-Id: If6e32a4297a4ef74d5c7c21b564a3462831be003
Closes-Bug: #1294754

mcagents/net_probe.rb

@@ -116,8 +116,8 @@ module MCollective
           begin
             socket.shutdown
           rescue Errno::ENOTCONN
-            socket.close
           end
+          socket.close
         end
       end