change to tf

vars.tf

+variable "image" {
+  default = "CentOS-7-x86_64-GenericCloud-1905"
+}
+
+variable "flavor" {
+  default = "m1.medium"
+}
+
+variable "pool" {
+  default = "bright-external-flat-externalnet"
+}
+
+variable "ssh_key_private" {
+  default     = "~/.ssh/id_rsa"
+  description = "Path to the SSH public key for accessing cloud instances. Used for creating AWS keypair."
+}