Fixup vault etcd check (#2938)

* Fixup vault etcd

* Update main.yml

roles/vault/tasks/shared/check_etcd.yml

@@ -2,7 +2,7 @@
 
 - name: check_etcd | Check if etcd is up and reachable
   uri:
-    url: "{{ vault_etcd_url }}/health"
+    url: "{{ vault_etcd_url.split(',') | first }}/health"
     validate_certs: no
     client_cert: "{{ etcd_cert_dir }}/node-{{ inventory_hostname }}.pem"
     client_key: "{{ etcd_cert_dir }}/node-{{ inventory_hostname }}-key.pem"
@@ -26,5 +26,5 @@
   fail:
     msg: >
          Unable to start Vault cluster! Etcd is not available at
-         {{ vault_etcd_url }} however it is needed by Vault as a backend.
+         {{ vault_etcd_url.split(',') | first }} however it is needed by Vault as a backend.
   when: vault_etcd_needed|d() and not vault_etcd_available