Updating to use calico-node v2.6.8

roles/download/defaults/main.yml

@@ -29,11 +29,11 @@ kubeadm_version: "{{ kube_version }}"
 etcd_version: v3.2.4
 # TODO(mattymo): Move calico versions to roles/network_plugins/calico/defaults
 # after migration to container download
-calico_version: "v2.6.7"
-calico_ctl_version: "v1.6.1"
-calico_cni_version: "v1.11.2"
-calico_policy_version: "v1.0.0"
-calico_rr_version: "v0.4.0"
+calico_version: "v2.6.8"
+calico_ctl_version: "v1.6.3"
+calico_cni_version: "v1.11.4"
+calico_policy_version: "v1.0.3"
+calico_rr_version: "v0.4.2"
 flannel_version: "v0.10.0"
 flannel_cni_version: "v0.3.0"
 istio_version: "0.2.6"