Add support for triggering jUnit-style XML output from run_tests.py when unit tests are executed.
Add support for triggering jUnit-style XML output from run_tests.py when unit tests are executed.

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