Fix unintended SIGPIPEs. (#7214)

roles/etcd/tasks/join_etcd-events_member.yml

@@ -25,7 +25,7 @@
       {%- endfor -%}
 
 - name: Join Member | Ensure member is in etcd-events cluster
-  shell: "set -o pipefail && {{ bin_dir }}/etcdctl member list | grep -q {{ etcd_events_access_address }}"
+  shell: "set -o pipefail && {{ bin_dir }}/etcdctl member list | grep {{ etcd_events_access_address }} >/dev/null"
   args:
     executable: /bin/bash
   register: etcd_events_member_in_cluster