Replace some magic numbers with constants.
Replace some magic numbers with constants.

metaperl/behave,jenisys/behave,Gimpneek/behave,metaperl/behave,KevinMarkVI/behave-parallel,kymbert/behave,joshal/behave,Gimpneek/behave,kymbert/behave,connorsml/behave,mzcity123/behave,hugeinc/behave-parallel,spacediver/behave,memee/behave,benthomasson/behave,spacediver/behave,Abdoctor/behave,joshal/behave,mzcity123/behave,allanlewis/behave,connorsml/behave,charleswhchan/behave,Gimpneek/behave,KevinOrtman/behave,vrutkovs/behave,charleswhchan/behave,jenisys/behave,Abdoctor/behave,tokunbo/behave-parallel,KevinOrtman/behave,tokunbo/behave-parallel,vrutkovs/behave,allanlewis/behave,benthomasson/behave