refactored stop tests - were failing on faster machines or when ran without coverage
refactored stop tests - were failing on faster machines or when ran without coverage

zhangjingpu/prophiler,lajosbencz/prophiler,fabfuel/prophiler,zhangjingpu/prophiler,zhangjingpu/prophiler,lajosbencz/prophiler,lajosbencz/prophiler,zhangjingpu/prophiler,fabfuel/prophiler,lajosbencz/prophiler,fabfuel/prophiler,zhangjingpu/prophiler,lajosbencz/prophiler,fabfuel/prophiler