added instructions for setting zone/project in gcloud config
added instructions for setting zone/project in gcloud config

evandbrown/distributed-load-testing-using-kubernetes,llamashoes/distributed-load-testing-using-kubernetes,evandbrown/distributed-load-testing-using-kubernetes,GoogleCloudPlatform/distributed-load-testing-using-kubernetes,dcbdmb/distributed-load-testing-using-kubernetes,GoogleCloudPlatform/distributed-load-testing-using-kubernetes,dcbdmb/distributed-load-testing-using-kubernetes,llamashoes/distributed-load-testing-using-kubernetes