Modules: add VRRP subnet

Add module to manage SelVPC VRRP subnets.

modules/vrrp_subnet/README.md

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+# VRRP Subnet
+
+Terraform module for creating a single SelVPC V2 VRRP Subnet.
+
+## Variables
+
+  * `vrrp_subnet_project_id` - Project of the SelVPC V2 VRRP Subnet.
+
+  * `vrrp_subnet_region` - Region of the SelVPC V2 VRRP Subnet.
+
+  * `vrrp_subnet_prefix_length` - Prefix length of the SelVPC V2 VRRP Subnet.
+
+  * `vrrp_subnet_ip_version` - IP version of the SelVPC V2 VRRP Subnet.
+
+## Outputs
+
+  * `vrrp_subnet_id` - ID of the created SelVPC V2 VRRP Subnet.

modules/vrrp_subnet/main.tf

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+resource "selvpc_resell_vrrp_subnet_v2" "vrrp_subnet_1" {
+  project_id    = "${var.vrrp_subnet_project_id}"
+  master_region = "${var.vrrp_subnet_master_region}"
+  slave_region  = "${var.vrrp_subnet_slave_region}"
+  prefix_length = "${var.vrrp_subnet_prefix_length}"
+  ip_version    = "${var.vrrp_subnet_ip_version}"
+}

modules/vrrp_subnet/outputs.tf

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+output "vrrp_subnet_id" {
+  value = "${selvpc_resell_vrrp_subnet_v2.vrrp_subnet_1.id}"
+}

modules/vrrp_subnet/vars.tf

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+variable "vrrp_subnet_project_id" {
+  description = "Project of the SelVPC V2 VRRP Subnet"
+}
+
+variable "vrrp_subnet_master_region" {
+  description = "Master region of the SelVPC V2 VRRP Subnet"
+}
+
+variable "vrrp_subnet_slave_region" {
+  description = "Slave region of the SelVPC V2 VRRP Subnet"
+}
+
+variable "vrrp_subnet_prefix_length" {
+  description = "Prefix length of the SelVPC V2 VRRP Subnet"
+  default     = 29
+}
+
+variable "vrrp_subnet_ip_version" {
+  description = "IP version of the SelVPC V2 VRRP Subnet"
+  default     = "ipv4"
+}