Switch test DNS resolution

Original test site is not resolving at the moment.
Switching test sites to avoid the failure.

Change-Id: I4099383d9fe4a0303a218e1ae61df2545934b41e
Related-Bug: #1968615

roles/ipa-multinode/tasks/ipaserver-subnode-install.yml

@@ -165,9 +165,11 @@
       - "user: {{ freeipa_principal }}"
       - "password: {{ freeipa_admin_password }}"
 
+# Note(rlandy): Switching to IBM DNS
+# https://bugs.launchpad.net/tripleo/+bug/1968615 is fixed
 - name: Check DNS works
   shell: >
-    ping -c 5 redhat.com
+    ping -c 5 ibm.com
   register: ping_output_com
 
 - debug:

roles/ipa-multinode/tasks/ipaserver-undercloud-setup.yml

@@ -278,9 +278,11 @@
         state: present
       when: mirror_host_record_public.stdout_lines|length >=2
 
+# Note(rlandy): Switching to IBM DNS till
+# https://bugs.launchpad.net/tripleo/+bug/1968615 is fixed
 - name: Check that the DNS works
   shell: >
-    ping -c 10 redhat.com
+    ping -c 10 ibm.com
   register: dig_ouput_com
   ignore_errors: true