using keys in vars file for openstack_compute_keypair_v2"

main.tf

 resource "openstack_compute_keypair_v2" "keypair" {
-  name       = "my-keypair"
-  public_key = "${file("~/.ssh/id_rsa.pub")}"
+  name       = "${var.os-gen-keypair}"
+  public_key = "${var.public-key}"
 }
 
 #local variable for ssh connect to ohpc