Split deploy steps in separate playbooks: part1 (#3451)

* Fix bootstrap_os/ubuntu idempotency

* Update bastion role

* move container_engine in sub-roles

* requires ansible 2.5

* ubuntu18 as first CI job

roles/container-engine/docker/vars/ubuntu-amd64.yml

@@ -0,0 +1,49 @@
+---
+docker_kernel_min_version: '3.10'
+
+# https://download.docker.com/linux/ubuntu/
+docker_versioned_pkg:
+  'latest': docker-ce
+  '1.11': docker-engine=1.11.2-0~{{ ansible_distribution_release|lower }}
+  '1.12': docker-engine=1.12.6-0~ubuntu-{{ ansible_distribution_release|lower }}
+  '1.13': docker-engine=1.13.1-0~ubuntu-{{ ansible_distribution_release|lower }}
+  '17.03': docker-ce=17.03.2~ce-0~ubuntu-{{ ansible_distribution_release|lower }}
+  '17.09': docker-ce=17.09.0~ce-0~ubuntu-{{ ansible_distribution_release|lower }}
+  '17.12': docker-ce=17.12.1~ce-0~ubuntu-{{ ansible_distribution_release|lower }}
+  '18.06': docker-ce=18.06.1~ce~3-0~ubuntu
+  'stable': docker-ce=18.06.1~ce~3-0~ubuntu
+  'edge': docker-ce=18.06.1~ce~3-0~ubuntu
+
+docker_package_info:
+  pkg_mgr: apt
+  pkgs:
+    - name: "{{ docker_versioned_pkg[docker_version | string] }}"
+      force: yes
+
+docker_repo_key_info:
+  pkg_key: apt_key
+  url: '{{ docker_ubuntu_repo_gpgkey }}'
+  repo_keys:
+    - 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
+
+docker_repo_info:
+  pkg_repo: apt_repository
+  repos:
+    - >
+       deb {{ docker_ubuntu_repo_base_url }}
+       {{ ansible_distribution_release|lower }}
+       stable
+
+dockerproject_repo_key_info:
+  pkg_key: apt_key
+  url: '{{ dockerproject_apt_repo_gpgkey }}'
+  repo_keys:
+    - 58118E89F3A912897C070ADBF76221572C52609D
+
+dockerproject_repo_info:
+  pkg_repo: apt_repository
+  repos:
+    - >
+       deb {{ dockerproject_apt_repo_base_url }}
+       {{ ansible_distribution|lower }}-{{ ansible_distribution_release|lower }}
+       main