RFR(S): 8236035: refactor ObjectMonitor::set_owner() and _owner field setting

[Kim Barrett]

> On Jan 28, 2020, at 12:11 PM, Daniel D. Daugherty <daniel.daugherty at oracle.com> wrote:
> In summary, I'm planning to leave these two pieces of code as they are
> in this version of the fix.
> 
> Kim, please confirm that you are okay with this or not.

I really dislike mixing acquire/release with {load,store}{load,store}
for various reason.  I think we should consider eliminating loadload
and friends in favor of consistent acquire/release usage.  But that's
a discussion that is clearly out of scope for this change, so I'll
accept the change as is.