RFR 8186186 : GSSContext.isEstablished() can return true on error state

[Weijun Wang]

The change looks fine.

Thanks
Max

> On Aug 22, 2018, at 9:54 AM, Ivan Gerasimov <ivan.gerasimov at oracle.com> wrote:
> 
> Hello!
> 
> Would you please help review the fix?
> 
> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8186186
> WEBREV: http://cr.openjdk.java.net/~igerasim/8186186/01/webrev/
> 
> With kind regards,
> Ivan
>