updated vars

ohpc-instance/main.tf

-variable "ohpc_instance_name" {default = "ohpc"}
-variable "image_ohpc" {default = "CentOS-7-x86_64-GenericCloud-1905"}
-variable "flavor" {default = "m1.medium"}
-variable "keypair_name" {default = "os-gen-keypair"}
-variable "internal_net" {default = "clusternet"}
-variable "external_net" {default = "dmznet"}
+variable "ohpc_instance_name" {default = "string"}
+variable "image_ohpc" {default = "string"}
+variable "flavor" {default = "string"}
+variable "keypair_name" {default = "string"}
+variable "internal_net" {default = "string"}
+variable "external_net" {default = "string"}
 variable "floating_ip_ohpc" {type = string}
-variable "host_prefix" {default = "164.111.161.%s"}
-variable "ohpc_user" {default = "centos"}
-variable "ssh_private_key" {default = "~/.ssh/id_rsa"}
+variable "host_prefix" {default = "string"}
+variable "ohpc_user" {default = "string"}
+variable "ssh_private_key" {default = "string"}
+
 
 # creates details for the OHPC instance
 resource "openstack_compute_instance_v2" "ohpc" {