[IR plugin] Copy cert file to tester_node

When tobiko is run on a tripleo setup but it is not executed from the
undercloud node, some files such as the certificate file need to be
copied from the undercloud node to the tester node

Change-Id: Id78005d21e5e225666155fdbcb5e2385b5aa43ee

infrared_plugin/roles/tobiko-ir-before-run/tasks/main.yaml

@@ -18,7 +18,7 @@
         key: "{{ test_host_pubkey_result.stdout }}"
   ignore_errors: yes
 
-- name: copy /etc/hosts from the undercloud to the test_host
+- name: copy files from the undercloud to the test_host
   block:
     - name: read /etc/hosts from the undercloud
       become: true
@@ -43,6 +43,24 @@
         path: /etc/hosts
         regexp: '^127.0.0.1 .*undercloud'
         state: absent
+
+    - name: copy crt file from the undercloud
+      become: true
+      slurp:
+        src: /etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt
+      delegate_to: "{{ groups.undercloud|first }}"
+      register: crt_file
+
+    - name: write crt file to the test_host
+      become: true
+      copy:
+        content: "{{ crt_file.content | b64decode }}"
+        dest: /etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt
+        force: true
+        owner: root
+        group: root
+        mode: '0444'
+
   ignore_errors: yes
   when:
     - groups.get("undercloud")