Use ansible_facts in tripleo_ssh_known_hosts role

It was missed in original patch to switch to
ansible_facts[1].

For providing test value for 'ssh_host_key_rsa_public' overriding
it in 'ansible_facts' with set_fact.

[1] https://review.opendev.org/c/openstack/tripleo-ansible/+/776666

Closes-Bug: #1923403
Related-Bug: #1915761
Change-Id: I9d5ae576c57eefe5496f9dda71e8eac23e45e89f
(cherry picked from commit 30df6f5437)

tripleo_ansible/roles/tripleo_ssh_known_hosts/molecule/default/converge.yml

@@ -18,5 +18,8 @@
 - name: Converge
   hosts: all
   pre_tasks:
+    - name: Override ssh_host_key_rsa_public test value in ansible_facts
+      set_fact:
+        ansible_facts: "{{ ansible_facts|combine({'ssh_host_key_rsa_public': 'AAAATEST'}) }}"
   roles:
     - role: "tripleo_ssh_known_hosts"

tripleo_ansible/roles/tripleo_ssh_known_hosts/molecule/default/molecule.yml

@@ -35,7 +35,6 @@ provisioner:
           allovercloud:
             hosts:
               ubi8:
-                ansible_ssh_host_key_rsa_public: AAAATEST
                 ctlplane_ip: 10.0.0.1
                 ctlplane_hostname: ubi8.ctlplane.localdomain
                 internal_api_ip: 10.0.1.1

tripleo_ansible/roles/tripleo_ssh_known_hosts/molecule/no_networks/converge.yml

@@ -18,5 +18,8 @@
 - name: Converge
   hosts: all
   pre_tasks:
+    - name: Override ssh_host_key_rsa_public test value in ansible_facts
+      set_fact:
+        ansible_facts: "{{ ansible_facts|combine({'ssh_host_key_rsa_public': 'AAAATEST'}) }}"
   roles:
     - role: "tripleo_ssh_known_hosts"

tripleo_ansible/roles/tripleo_ssh_known_hosts/molecule/no_networks/molecule.yml

@@ -35,7 +35,6 @@ provisioner:
           allovercloud:
             hosts:
               ubi8:
-                ansible_ssh_host_key_rsa_public: AAAATEST
   log: true
   env:
     ANSIBLE_STDOUT_CALLBACK: yaml

tripleo_ansible/roles/tripleo_ssh_known_hosts/tasks/main.yml

@@ -49,7 +49,7 @@
         ssh_known_hosts_lines: |-
           {% for host in groups['allovercloud'] | intersect(play_hosts) %}
           {%   set hostdata = hostvars[host] %}
-          {%   if 'ansible_ssh_host_key_rsa_public' in hostdata %}
+          {%   if 'ssh_host_key_rsa_public' in hostdata['ansible_facts'] %}
           {%     set entries = [] %}
           {%     set enabled_host_networks = hostdata['tripleo_role_networks']|default([]) %}
           {%     for network in enabled_host_networks %}
@@ -64,7 +64,7 @@
           {%       set _ = entries.append('[' ~ hostdata['canonical_hostname'] ~ ']*') %}
           {%     endif %}
           {%     set _ = entries.append('[' ~ host ~ ']*') %}
-          {%     set line = entries|unique|join(',') ~ ' ssh-rsa ' ~ hostdata['ansible_ssh_host_key_rsa_public'] %}
+          {%     set line = entries|unique|join(',') ~ ' ssh-rsa ' ~ hostdata['ansible_facts']['ssh_host_key_rsa_public'] %}
           {{ line }}
           {%   endif %}
           {% endfor %}