Change from Nova security groups to Neutron (#2910)

* Replace `openstack_compute_secgroup_v2` with `openstack_networking_secgroup_v2`

The `openstack_networking_secgroup_v2` resource allow specifications of
both ingress and egress. Nova security groups define ingress rules only.

This change will also allow for more user-friendly specified security
rules, as the different security group resources have different HCL
syntax.

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

@@ -60,6 +60,10 @@ variable "bastion_fips" {
   type = "list"
 }
 
+variable "bastion_allowed_remote_ips" {
+  type = "list"
+}
+
 variable "supplementary_master_groups" {
   default = ""
 }