Updated hash table test driver for unreachable warnings
Updated hash table test driver for unreachable warnings

MSVC 2013 has annotated the 'abort' function so that not only is our
workaround to avoid warnings not necessary, it now generates is own
unreachable code warnings.

che2/bde,che2/bde,bloomberg/bde,bloomberg/bde,bloomberg/bde,che2/bde,che2/bde,bloomberg/bde,bloomberg/bde