Add retries to 'Set label for route reflector' task (#7645)

roles/network_plugin/calico/rr/tasks/main.yml

@@ -9,3 +9,8 @@
   command: >-
     {{ bin_dir }}/calicoctl.sh label node {{ inventory_hostname }}
     'i-am-a-route-reflector=true' --overwrite
+  changed_when: false
+  register: calico_rr_label
+  until: calico_rr_label is succeeded
+  delay: "{{ retry_stagger | random + 3 }}"
+  retries: 10