RFR (L) 8174749: Use hash table/oops for MemberName table

[John Rose]

On May 26, 2017, at 1:32 PM, coleen.phillimore at oracle.com wrote:
> 
> I thought we should add a different API for expanding a MemberName when you are holding a RMN, that isn't applicable for field MemberName.  That's why I made this change.

I see.  Well, that would in fact replace the whole MN.expand thing,
since that's what it's for.  Until we have the different API, let's keep
the old one intact.  Note the differing treatment of fields and methods
in the patch I suggested; I think that makes sense.

— John