cri-o: use only images from Docker Hub

For the time being it won't be added to the Red Hat registry, so use
only what is available on Docker Hub.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

roles/docker/tasks/systemcontainer_crio.yml

@@ -85,17 +85,13 @@
 
     - name: Set to default prepend
       set_fact:
-        l_crio_image_prepend: "gscrivano"
+        l_crio_image_prepend: "docker.io/gscrivano"
+        l_crio_image_name: "crio-o-fedora"
 
-    - name: Use Red Hat Registry for image when distribution is Red Hat
+    - name: Use Centos based image when distribution is Red Hat or CentOS
       set_fact:
-        l_crio_image_prepend: "registry.access.redhat.com/openshift3"
-      when: ansible_distribution == 'RedHat'
-
-    - name: Use Fedora Registry for image when distribution is Fedora
-      set_fact:
-        l_crio_image_prepend: "registry.fedoraproject.org/f25"
-      when: ansible_distribution == 'Fedora'
+        l_crio_image_name: "cri-o-centos"
+      when: ansible_distribution in ['RedHat', 'CentOS']
 
     # For https://github.com/openshift/openshift-ansible/pull/4049#discussion_r114478504
     - name: Use a testing registry if requested
@@ -107,7 +103,7 @@
 
     - name: Set the full image name
       set_fact:
-        l_crio_image: "{{ l_crio_image_prepend }}/cri-o:latest"
+        l_crio_image: "{{ l_crio_image_prepend }}/{{ l_crio_image_name }}:latest"
 
 # NOTE: no_proxy added as a workaround until https://github.com/projectatomic/atomic/pull/999 is released
 - name: Pre-pull CRI-O System Container image