RFR: JDK-8186825: some memory leak issues in the transport_startTransport

[Alex Menkov]

Hi all,

Please review the fix for
   https://bugs.openjdk.java.net/browse/JDK-8186825
webrev:
   http://cr.openjdk.java.net/~amenkov/jdk14/jdwp_memory_leak/webrev/

TransportInfo structure is used to pass data from main thread 
(transport_startTransport function) to acceptThread/attachThread and 
should be released by acceptThread/attachThread.

--alex