Code Review Request JDK-8170329 New SSLSocket testing template

[Xuelei Fan]

Hi,

Please review this test update:
   http://cr.openjdk.java.net/~xuelei/8170329/webrev.00/

The new template (SSLSocketTemplate.java) could be used to avoid the 
anti-free-port issues.  By using sub-classes of it, the new one can 
simplify the general SSLSocket test code significantly.

Thanks,
Xuelei