change simple config example to load 3 workers that do all jobs
change simple config example to load 3 workers that do all jobs

yonglehou/GearmanManager,productsupcom/GearmanManager,hechunwen/GearmanManager,lvbaosong/GearmanManager,yonglehou/GearmanManager,hechunwen/GearmanManager,productsupcom/GearmanManager,hhy5861/GearmanManager,brianlmoon/GearmanManager,hhy5861/GearmanManager