Add --no-sync to etcdctl member list

Fixes #447

roles/etcd/tasks/configure.yml

 ---
 - name: Configure | Check if member is in cluster
-  shell: "etcdctl --peers={{ etcd_access_addresses }} member list | grep -q {{ etcd_access_address }}"
+  shell: "etcdctl --no-sync --peers={{ etcd_access_addresses }} member list | grep -q {{ etcd_access_address }}"
   register: etcd_member_in_cluster
   ignore_errors: true
   changed_when: false