RFR: 8241427: Coarsen locking in Modules::add_module_exports

[Claes Redestad]

Hi,

On 2020-03-25 18:48, Harold Seigel wrote:
> Hi Claes,
> 
> It looks like you removed this from modules.cpp.  Can you also remove it 
> from modules.hpp?
> 
>     Modules::get_module(Symbol* package_name, Handle h_loader, TRAPS)

Done.

> 
> Otherwise, the change looks good.

I also updated the webrev to remove 2 tests that poke at the internal
API to provoke the IAE we'll no longer be throwing. I'll need to check
if there's any other fallout from higher tiers - or if we should dial
this back a bit...

/Claes