Fix canal's calico networking config for ETCD TLS

Also fixes kube-apiserver upgrade that was erroneously
deleted in a previous commit.

roles/kubernetes/master/tasks/pre-upgrade.yml

@@ -14,3 +14,12 @@
     name: kube-apiserver
     state: stopped
   when: (kube_apiserver_service_file.stat.exists|default(False) or kube_apiserver_init_script.stat.exists|default(False))
+
+- name: "Pre-upgrade | remove kube-apiserver service definition"
+  file:
+    path: "{{ item }}"
+    state: absent
+  when: (kube_apiserver_service_file.stat.exists|default(False) or kube_apiserver_init_script.stat.exists|default(False))
+  with_items:
+    - /etc/systemd/system/kube-apiserver.service
+    - /etc/init.d/kube-apiserver