cri-o: Default insecure registries to ""

roles/docker/tasks/systemcontainer_crio.yml

@@ -2,6 +2,7 @@
 # TODO: Much of this file is shared with container engine tasks
 - set_fact:
     l_insecure_crio_registries: "{{ '\"{}\"'.format('\", \"'.join(openshift.docker.insecure_registries)) }}"
+  when: openshift.docker.insecure_registries
 
 - name: Ensure container-selinux is installed
   package:

roles/docker/templates/crio.conf.j2

@@ -117,7 +117,7 @@ signature_policy = ""
 
 # insecure_registries is used to skip TLS verification when pulling images.
 insecure_registries = [
-{{ l_insecure_crio_registries }}
+{{ l_insecure_crio_registries|default("") }}
 ]
 
 # The "crio.network" table contains settings pertaining to the