'DecimalImpUtil::add' non-corner test cases.
'DecimalImpUtil::add' non-corner test cases.

Value based testing for non-'NaN' and non-'Inf' states.  These
tets should function as expected for normal arithmetic.  Testing
for corner cases requires  a different table.

RMGiroux/bde-allocator-benchmarks,RMGiroux/bde-allocator-benchmarks,gbleaney/Allocator-Benchmarks,frutiger/bde,apaprocki/bde,gbleaney/Allocator-Benchmarks,minhlongdo/bde,bloomberg/bde,jmptrader/bde,bloomberg/bde,abeels/bde,bloomberg/bde,idispatch/bde,che2/bde,dharesign/bde,dharesign/bde,osubboo/bde,dbremner/bde,gbleaney/Allocator-Benchmarks,saxena84/bde,mversche/bde,apaprocki/bde,minhlongdo/bde,osubboo/bde,frutiger/bde,che2/bde,frutiger/bde,mversche/bde,RMGiroux/bde-allocator-benchmarks,dbremner/bde,idispatch/bde,saxena84/bde,bowlofstew/bde,saxena84/bde,dharesign/bde,abeels/bde,abeels/bde,jmptrader/bde,osubboo/bde,jmptrader/bde,bloomberg/bde-allocator-benchmarks,bowlofstew/bde,bowlofstew/bde,mversche/bde,gbleaney/Allocator-Benchmarks,minhlongdo/bde,bloomberg/bde-allocator-benchmarks,dbremner/bde,frutiger/bde,mversche/bde,bloomberg/bde-allocator-benchmarks,abeels/bde,RMGiroux/bde-allocator-benchmarks,bloomberg/bde-allocator-benchmarks,dharesign/bde,che2/bde,abeels/bde,osubboo/bde,apaprocki/bde,bloomberg/bde,saxena84/bde,idispatch/bde,RMGiroux/bde-allocator-benchmarks,abeels/bde,dbremner/bde,bowlofstew/bde,jmptrader/bde,apaprocki/bde,che2/bde,minhlongdo/bde,apaprocki/bde,idispatch/bde,bloomberg/bde,bloomberg/bde-allocator-benchmarks