Fix Calico Felix reporting usage data, require opt-in

* Calico Felix has been reporting anonymous usage data about the
version and cluster size, which violates Typhoon's privacy policy
where analytics should be opt-in only
* Add a variable enable_reporting (default: false) to allow opting
in to reporting usage data to Calico (or future components)

digital-ocean/container-linux/kubernetes/bootkube.tf

@@ -1,6 +1,6 @@
 # Self-hosted Kubernetes assets (kubeconfig, manifests)
 module "bootkube" {
-  source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=3d9f957aecf9c7fb53b9ec07be2ecfa9ea2692f8"
+  source = "git::https://github.com/poseidon/terraform-render-bootkube.git?ref=dbf67da1cbd4c3036e3b551850d3a51b5fc4ee7c"
 
   cluster_name          = "${var.cluster_name}"
   api_servers           = ["${format("%s.%s", var.cluster_name, var.dns_zone)}"]
@@ -11,4 +11,5 @@ module "bootkube" {
   pod_cidr              = "${var.pod_cidr}"
   service_cidr          = "${var.service_cidr}"
   cluster_domain_suffix = "${var.cluster_domain_suffix}"
+  enable_reporting      = "${var.enable_reporting}"
 }

digital-ocean/container-linux/kubernetes/variables.tf

@@ -92,3 +92,9 @@ variable "cluster_domain_suffix" {
   type        = "string"
   default     = "cluster.local"
 }
+
+variable "enable_reporting" {
+  type        = "string"
+  description = "Enable usage or analytics reporting to upstreams (Calico)"
+  default     = "false"
+}