Add etcd key and cert environment variables for use with client auth

roles/network_plugin/calico/tasks/main.yml

@@ -83,6 +83,8 @@
   uri:
     url: https://localhost:2379/health
     validate_certs: no
+    client_cert: "{{ etcd_cert_dir }}/node-{{ inventory_hostname }}.pem"
+    client_key: "{{ etcd_cert_dir }}/node-{{ inventory_hostname }}-key.pem"
   register: result
   until: result.status == 200 or result.status == 401
   retries: 10