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

[Thomas Schatzl]

Hi Coleen,

On Fri, 2018-03-23 at 07:55 -0400, 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.

  looks good to me.

Thanks,
  Thomas