Bug 1822701: OpenStack: Set port instead of vrrp protocol name

If VRRP plugin is disabled in neutron, then Terraform fails to fetch
the desired protocol number.

To prevent the issue this patch explicitly sets the protocol number
to 112 for the sg rules.

For more information:
https://docs.openstack.org/api-ref/network/v2/index.html?expanded=create-security-group-rule-detail

data/data/openstack/topology/sg-master.tf

@@ -355,7 +355,9 @@ resource "openstack_networking_secgroup_rule_v2" "master_ingress_services_udp_fr
 resource "openstack_networking_secgroup_rule_v2" "master_ingress_vrrp" {
   direction         = "ingress"
   ethertype         = "IPv4"
-  protocol          = "vrrp"
+  # Explicitly set the vrrp protocol number to prevent cases when the Neutron Plugin
+  # is disabled and it cannot identify a number by name.
+  protocol          = "112"
   remote_ip_prefix  = var.cidr_block
   security_group_id = openstack_networking_secgroup_v2.master.id
 

data/data/openstack/topology/sg-worker.tf

@@ -260,7 +260,9 @@ resource "openstack_networking_secgroup_rule_v2" "worker_ingress_services_udp_fr
 resource "openstack_networking_secgroup_rule_v2" "worker_ingress_vrrp" {
   direction         = "ingress"
   ethertype         = "IPv4"
-  protocol          = "vrrp"
+  # Explicitly set the vrrp protocol number to prevent cases when the Neutron Plugin
+  # is disabled and it cannot identify a number by name.
+  protocol          = "112"
   remote_ip_prefix  = var.cidr_block
   security_group_id = openstack_networking_secgroup_v2.worker.id