RFR(XXS) 8217785: Padding ParallelTaskTerminator::_offered_termination variable

[zgu at redhat.com]

> Please make sure that the title in the push message is correct :)
> (s/offerred/offered/ - I fixed it in the CR title).
Oops.

Thank you, Thomas,

-Zhengyu

> 
> Thanks,
>   Thomas
> 
>