Enhanced TestCommon/CommonTests_Tally.h to debug subtle bug with tally/refernece
counts etc. Now I see its more generically a bug with all the containers - I think
and how i handle iteration.

Sent emial to startl and documetned and will think through what todo - but not a regression -
just a long standing desisgn flaw (I think).
MakeIterableFromIterator() uses BLOCK_ALLOCATION