Define and implement specs for bootstrap-os (#4455)

* Add README to bootstrap-os role

* Rework bootstrap-os once more

* Document workarounds for bugs/deficiencies in Ansible modules
* Unify and document role variables
* Remove installation of additional packages and repositories
* Merge Ubuntu and Debian tasks
* Remove pipelining setting from default playbooks
* Fix OpenSUSE not running its required tasks

roles/bootstrap-os/tasks/bootstrap-clearlinux.yml

@@ -1,16 +1,16 @@
 ---
-- name: Install basic packages to run containers
+# ClearLinux ships with Python installed
+
+- name: Install basic package to run containers
   package:
-    name: "{{ item }}"
+    name: containers-basic
     state: present
-  with_items:
-    - containers-basic
 
 - name: Make sure docker service is enabled
   systemd:
     name: docker
-    masked: no
-    enabled: yes
-    daemon_reload: yes
+    masked: false
+    enabled: true
+    daemon_reload: true
     state: started
   become: true