func createStubInstanceContext() *updateutil.InstanceContext {
	context := updateutil.InstanceContext{}
	context.Arch = "amd64"
	context.CompressFormat = "tar.gz"
	context.InstallerName = updateutil.PlatformLinux
	context.Platform = updateutil.PlatformLinux
	context.PlatformVersion = "2015.9"
	return &context
}