Changed 'operator<<(ostream &, DecimalXX)' to DPD.
Changed 'operator<<(ostream &, DecimalXX)' to DPD.

The 'operator<<' function for 'DecimalXX' types now will convert
to DPD and then call the 'decNumber' string formatting functions
to output.  This should unify a lot of the formatting, and make
the test drivers for formatting easier.

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