Merge "Improve connectivity check" into stable/train

tripleo_ansible/roles/tripleo_nodes_validation/tasks/ping.yml

@@ -32,10 +32,12 @@
 - name: Network availability validation block
   block:
     - name: Check IP responsiveness
-      command: "{{ _ping_cmd }} -w 10 -c 1 {{ controller }}"
+      command: "{{ _ping_cmd }} -w 10 -c 5 {{ controller }}"
       retries: 10
       delay: 60
       changed_when: false
+      register: ping_result
+      until: ping_result.rc == 0
 
     - name: Validate packet with {{ _mtu }} MTU size can reach controller from {{ _nic }}
       command: "{{ _ping_cmd }} -w 10 -s {{ _mtu }} -c 1 {{ controller }}"