Trust systemd unit template

With ansible 2.19 jinja templating changes, data that
can contain templates will require explicit trust via
trust_as_template to be allowed to render.

Signed-off-by: rabi <ramishra@redhat.com>

Author: rabi

plugins/action/container_systemd.py

@@ -25,6 +25,7 @@
 
 from ansible.errors import AnsibleActionFail
 from ansible.plugins.action import ActionBase
+from ansible.template import trust_as_template
 from ansible.utils.display import Display
 
 
@@ -203,7 +204,7 @@ def _get_unit_template(self):
             raise AnsibleActionFail('Template {} was '
                                     'not found'.format(source))
         with open(source) as template_file:
-            data = template_file.read()
+            data = trust_as_template(template_file.read())
         return data
 
     def _create_units(self, container_config, task_vars):