Don't install kolla

This role should really be focused on creating a working docker and
registry, and installing kolla is not really related to that.

Even in CI, if container modifications are required it is more likely
to happen via modifying existing images with
ansible-role-tripleo-modify-image, which doesn't involve the kolla
package.

Change-Id: I7ba8d89b75f206aa92bdfd907712b1b0b44a4c32

defaults/main.yml

@@ -5,7 +5,6 @@ container_registry_deploy_docker: true
 container_registry_deploy_docker_distribution: true
 container_registry_deployment_user: centos
 container_registry_docker_options: '--log-driver=journald --signature-verification=false --iptables=false --live-restore'
-container_registry_enable_container_images_build: true
 container_registry_insecure_registries: []
 container_registry_network_options: ''
 container_registry_host: localhost

tasks/docker-distribution.yml

@@ -5,12 +5,6 @@
     name: docker-distribution
     state: present
 
-- name: install the latest version of openstack-kolla
-  yum:
-    name: openstack-kolla
-    state: latest
-  when: container_registry_enable_container_images_build|bool
-
 - name: manage /etc/docker-distribution/registry/config.yml
   template:
     src: docker-distribution-config.yml.j2