Fix tripleo_hierdata permissions

Add become: true to the tasks that need to be able to write to /etc/

Change-Id: I24b118220ce2371f651cad6b8dfbbf5d031ee118
Related-Bug: #1883609

tripleo_ansible/roles/tripleo_hieradata/tasks/ansible_hieradata.yml

@@ -1,5 +1,6 @@
 ---
 - name: Check for hieradata file
+  become: true
   stat:
     path:
       src: "{{ hieradata_ansible_file }}"

tripleo_ansible/roles/tripleo_hieradata/tasks/hieradata_vars.yaml

@@ -15,11 +15,13 @@
 # under the License.
 
 - name: Copy overcloud.json to all_nodes.json
+  become: true
   copy:
     src: "{{ playbook_dir }}/group_vars/overcloud.json"
     dest: "{{ dest_path | default('/etc/puppet/hieradata/all_nodes.json') }}"
 
 - name: Render hieradata from template
+  become: true
   template:
     src: templates/{{ item }}.j2
     dest: "{{ dest_path | default('/etc/puppet/hieradata/' ~ item ~ '.json') }}"

tripleo_ansible/roles/tripleo_hieradata/tasks/main.yml

@@ -15,12 +15,14 @@
 # under the License.
 
 - name: Create /etc/puppet/hieradata
+  become: true
   file:
     path: /etc/puppet/hieradata
     state: directory
     mode: 0700
 
 - name: Write hiera config
+  become: true
   when:
     - (hieradata_files | length) > 0
   copy: