RFR (S) 8198760: Move global lock SpaceManager::_expand_lock to MutexLocker.cpp

[Lois Foltan]

Looks good.
Lois

On 3/23/2018 7:55 AM, coleen.phillimore at oracle.com wrote:
> Summary: We should avoid having global locks buried in cpp files
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8198760.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8198760
>
> Tested with mach5 tier1 and 2.
>
> Thanks,
> Coleen