RFR (S) 8216072: Remove TaskTerminator's assignment operator

[zgu at redhat.com]

Hi Thomas,

Thanks for reviewing and testing.

-Zhengyu

On Wed, 2019-01-30 at 13:27 +0100, Thomas Schatzl wrote:
> Hi,
> 
> On Tue, 2019-01-29 at 15:56 -0500, zgu at redhat.com wrote:
> > The assignment operator was a workaround for issues since resolved
> > by
> > JDK-8215047, JDK-8215299 and JDK-8215220. It is time to remove it
> > and
> > use ParallelTaskTerminator::reset_for_reuse() instead.
> > 
> > Bug: https://bugs.openjdk.java.net/browse/JDK-8216072
> > Webrev: 
> > http://cr.openjdk.java.net/~zgu/JDK-8216072/webrev.00/index.html
> 
>   looks good to me. Thanks for cleaning this up.
> 
> > Test:
> > 
> >   hotspot_gc (+/-UseOWSTTaskTerminator) on Linux x64 (fastdebug and
> > release)
> 
> hs-tier1-5 passed.
> 
> Thanks,
>   Thomas
> 
>