remove user_data which may mess up /etc/hosts

contrib/terraform/openstack/modules/compute/main.tf

-variable user_data {
-  type = "string"
-
-  default = <<EOF
-#cloud-config
-manage_etc_hosts: localhost
-package_update: true
-package_upgrade: true
-EOF
-}
-
 resource "openstack_compute_keypair_v2" "k8s" {
   name       = "kubernetes-${var.cluster_name}"
   public_key = "${chomp(file(var.public_key_path))}"
@@ -97,7 +86,6 @@ resource "openstack_compute_instance_v2" "bastion" {
     command = "sed s/USER/${var.ssh_user}/ contrib/terraform/openstack/ansible_bastion_template.txt | sed s/BASTION_ADDRESS/${var.bastion_fips[0]}/ > contrib/terraform/openstack/group_vars/no-floating.yml"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_instance_v2" "k8s_master" {
@@ -123,7 +111,6 @@ resource "openstack_compute_instance_v2" "k8s_master" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_instance_v2" "k8s_master_no_etcd" {
@@ -147,7 +134,6 @@ resource "openstack_compute_instance_v2" "k8s_master_no_etcd" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_instance_v2" "etcd" {
@@ -169,7 +155,6 @@ resource "openstack_compute_instance_v2" "etcd" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_instance_v2" "k8s_master_no_floating_ip" {
@@ -194,7 +179,6 @@ resource "openstack_compute_instance_v2" "k8s_master_no_floating_ip" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_instance_v2" "k8s_master_no_floating_ip_no_etcd" {
@@ -218,7 +202,6 @@ resource "openstack_compute_instance_v2" "k8s_master_no_floating_ip_no_etcd" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_instance_v2" "k8s_node" {
@@ -243,7 +226,6 @@ resource "openstack_compute_instance_v2" "k8s_node" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_instance_v2" "k8s_node_no_floating_ip" {
@@ -267,7 +249,6 @@ resource "openstack_compute_instance_v2" "k8s_node_no_floating_ip" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "${var.user_data}"
 }
 
 resource "openstack_compute_floatingip_associate_v2" "bastion" {
@@ -316,7 +297,6 @@ resource "openstack_compute_instance_v2" "glusterfs_node_no_floating_ip" {
     depends_on       = "${var.network_id}"
   }
 
-  user_data = "#cloud-config\nmanage_etc_hosts: localhost\npackage_update: true\npackage_upgrade: true"
 }
 
 resource "openstack_compute_volume_attach_v2" "glusterfs_volume" {