Bump kubernetes to v1.18.5

The container image, flannel_cni, is removed in upstream Kubespray
download role so we remove it as well.

Depends-On: Ie8be93ba62dc90229f54bd618c982aeaf4bdaafb
Change-Id: I7bc9f42fd5bb6a29d4dd16d9e56228dde58fd498
diff --git a/vars/kubernetes.yaml b/vars/kubernetes.yaml
index 75bd857..fed310c 100644
--- a/vars/kubernetes.yaml
+++ b/vars/kubernetes.yaml
@@ -61,19 +61,17 @@
 # -------------------------------------------------------------------------------
 # Nordix: Docker version
 # -------------------------------------------------------------------------------
-# NOTE (fdegir): versions of docker as of 13.02.2020 matching to what Kubespray uses
-# Please note that docker-ce version is configured to be overrideable since some scenarios
-# require different docker versions
-docker_ce_version: "{{ lookup('env', 'DOCKER_CE_VERSION') | default('5:18.09.9~3-0~ubuntu-bionic', true) }}"
+# NOTE (fdegir): versions of docker as of 13.07.2020 matching to what Kubespray requires
+docker_ce_version: "5:19.03.12~3-0~ubuntu-bionic"
 docker_ce_cli_version: "{{ docker_ce_version }}"
 docker_registry_version: "2.7.1"
-containerd_io_version: "1.2.6-3"
+containerd_io_version: "1.2.13-2"
 
 # -------------------------------------------------------------------------------
 # Kubernetes: Kubernetes and kubectl versions
 # -------------------------------------------------------------------------------
 # Kubernetes version that is supported by the pinned kubespray version
-kubernetes_version: "v1.17.0"
+kubernetes_version: "v1.18.5"
 # version of the kubectl should generally match to the version of kubernetes itself
 # but it would be good to have possibility to override it in case if someone needs it for some reason
 kubectl_version: "{{ kubernetes_version }}"