scenario:
  benchmark: dpi
  ExecOrder1: vm_1
  ExecOrder2: vm_2

Context:         
  VirtualMachines:
    vm_1:
      availability_zone: compute1
      OS_image: centos7
      public_network: "provider_network"
      role: ExecOrder1
    vm_2:
      availability_zone: compute1
      OS_image: centos7
      public_network: "provider_network"
      role: ExecOrder2