openSUSE: Use Leap 15.0 instead of 42.3 (#4442)

* Vagrantfile: Bump openSUSE to Leap 15.0

* roles: container-engine: Add 'containerd' package for openSUSE

The 'containerd' package contains the docker-containerd and
docker-containerd-shim binaries. We also need to ensure that the latest
version is installed since an older version may already be present (eg GCE
images)

* Remove docker log-opts for opensuse

* roles: bootstrap-os: Use lowercase 'o' for openSUSE

OpenSUSE is not a valid family name. The correct one is openSUSE

* roles: bootstrap-os: Update zypper cache before first installation

The zypper cache may be outdated so ensure that it's fully updated
before we try and install the bootstrap packages.

roles/container-engine/docker/tasks/main.yml

@@ -151,7 +151,7 @@
     pkg: "{{item.name}}"
     force: "{{item.force|default(omit)}}"
     conf_file: "{{item.yum_conf|default(omit)}}"
-    state: present
+    state: "{{item.state | default('present')}}"
     update_cache: "{{ omit if ansible_distribution == 'Fedora' else True }}"
   register: docker_task_result
   until: docker_task_result is succeeded
@@ -166,7 +166,7 @@
   action: "{{ docker_package_info.pkg_mgr }}"
   args:
     name: "{{ item.name }}"
-    state: present
+    state: "{{item.state | default('present')}}"
   with_items: "{{ docker_package_info.pkgs }}"
   register: docker_task_result
   until: docker_task_result is succeeded

roles/container-engine/docker/vars/suse.yml

@@ -5,6 +5,8 @@ docker_package_info:
   pkg_mgr: zypper
   pkgs:
     - name: docker
+    - name: containerd
+      state: latest
 
 docker_repo_key_info:
   pkg_key: ''