Code Review Request JDK-8170329 New SSLSocket testing template

[Wang Weijun]

This is not only a test update.

> On Nov 27, 2016, at 9:35 AM, Xuelei Fan <xuelei.fan at oracle.com> wrote:
> 
> 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