Add rpm-ostree tests (projectatomic#164)

* Add rpm-ostree tests

Add a basic test suite for rpm-ostree.  There are still a few subcommands
that still need to be added to the test suite.  These tests assume
that the atomic host is provisioned with the latest version as it will
move between HEAD and HEAD-1.

Tests:
- Use rpm-ostree to deploy by version then rollback and delete rollback
- Use rpm-ostree to deploy by checksum then rollback and delete rollback
- Use rpm-ostree to deploy HEAD-1 then use cleanup pending deployments
- Simulate rpm-ostree upgrade then rebase to HEAD and delete rollback
- Simulate rpm-ostree upgrade with package install, then rebase to HEAD
  with an uninstall of the same package, then delete rollback
- Enable and validate client side initramfs generation then disable
  initramfs and cleanup deployments

* fixup! Add rpm-ostree tests

* fixup! Add rpm-ostree tests

* fixup! Add rpm-ostree tests

* fixup! Add rpm-ostree tests

* fixup! Add rpm-ostree tests

roles/rpm_ostree_rebase/tasks/main.yml

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+---
+# vim: set ft=ansible:
+#
+# rpm-ostree rebase
+#   params:
+#     remote_name (required) name for remote
+#     remote_url (required) remote url
+#     refspec (required) remote refspec
+- name: Fail if remote_name, remote_url, or refspec is not defined
+  fail:
+    msg: "remote_name, remote_url, or refspec is not defined"
+  when: remote_name is undefined or
+        remote_url is undefined or
+        refspec is undefined
+
+- name: Add remote
+  command: ostree remote add --no-gpg-verify {{ remote_name }} {{ remote_url }}
+
+- name: Rebase
+  command: rpm-ostree rebase {{ remote_name }}:{{ refspec }}
+  register: rebase
+  until: rebase.rc == 0
+  retries: 3
+  delay: 5

roles/rpm_ostree_status_verify/tasks/main.yml

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+---
+# vim: set ft=ansible:
+#
+#  This role validates rpm-ostree status output.
+#
+#  Parameters:
+#   deployment (int) REQUIRED - index of deployment to verify
+#   expected (dict) REQUIRED - a dict of expected key/value pairs
+#   num_deployments (int) OPTIONAL - the number of deployments in output
+
+- name: Fail if deployment or expected is undefined
+  fail:
+    msg: "deployment or expected is undefined"
+  when: expected is undefined or
+        deployment is undefined
+
+- name: Get rpm-ostree status output
+  command: rpm-ostree status --json
+  register: ros_status
+
+- name: Set json output
+  set_fact:
+     ros_json: "{{ ros_status.stdout | from_json }}"
+
+- name: Set ros variable if deployment 0 is booted
+  set_fact:
+    ros_booted: "{{ ros_json['deployments'][0] }}"
+    ros_not_booted: "{{ ros_json['deployments'][1] if ros_json['deployments'][1] is defined else false }}"
+  when: ros_json['deployments'][0] is defined and ros_json['deployments'][0]['booted']
+
+- name: Set ros variable if deployment 1 is booted
+  set_fact:
+    ros_booted: "{{ ros_json['deployments'][1] }}"
+    ros_not_booted: "{{ ros_json['deployments'][0] if ros_json['deployments'][0] is defined else false }}"
+  when: ros_json['deployments'][1] is defined and ros_json['deployments'][1]['booted']
+
+- name: Set number of deployments
+  set_fact:
+     ros_num_deployments: "{{ ros_json['deployments'] | length }}"
+
+- name: Verify number of deployments
+  fail:
+    msg: |
+      "Number of deployments is incorrect.
+       Expected: {{ num_deployments }}.
+       Actual {{ ros_num_deployments }}"
+  when: num_deployments is defined and {{ num_deployments | int }} != {{ ros_num_deployments | int }}
+
+- name: Fail if deployment does not exist
+  fail:
+    msg: "deployment {{ deployment }} does not exist"
+  when: ros_json['deployments'][deployment] is undefined
+
+- name:  Fail if deployment {{ deployment }} values are incorrect
+  fail:
+    msg: "{{ item.key }} is incorrect or does not exist."
+  when: ros_json['deployments'][deployment][item.key] is undefined or
+        ros_json['deployments'][deployment][item.key] != item.value
+  with_dict: "{{ expected }}"

tests/rpm-ostree/README.md

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+This playbook tests the basic rpm-ostree commands and options.
+
+Core Functionality
+  - rpm-ostree compose
+  - rpm-ostree cleanup
+  - rpm-ostree db
+  - rpm-ostree deploy
+  - rpm-ostree rebase
+  - rpm-ostree rollback
+  - rpm-ostree status
+  - rpm-ostree upgrade
+  - rpm-ostree reload
+  - rpm-ostree initramfs
+
+To be Covered
+  - rpm-ostree db
+
+Covered In Another Test
+  - rpm-ostree install
+  - rpm-ostree uninstall
+
+### Prerequisites
+  - Ansible version 2.2 (other versions are not supported)
+
+  - Configure subscription data (if used)
+
+    If running against a RHEL Atomic Host, you should provide subscription
+    data that can be used by `subscription-manager`.  See
+    [roles/redhat_subscription/tasks/main.yml](roles/redhat_subscription/tasks/main.yml)
+    for additional details.
+
+  - Configure the required variables to your liking in [tests/rpm-ostree/vars.yml](vars.yml).
+
+### Running the Playbook
+
+To run the test, simply invoke as any other Ansible playbook:
+
+```
+$ ansible-playbook -i inventory tests/rpm-ostree/main.yml
+```
+
+*NOTE*: You are responsible for providing a host to run the test against and the
+inventory file for that host.

tests/rpm-ostree/callback_plugins

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+../../callback_plugins/

tests/rpm-ostree/info.txt

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+Test Coverage:
+* rpm-ostree cleanup
+* rpm-ostree deploy
+* rpm-ostree rebase
+* rpm-ostree rollback
+* rpm-ostree status
+* rpm-ostree upgrade
+* rpm-ostree reload
+* rpm-ostree initramfs
+
+Not Covered:
+* rpm-ostree compose
+* rpm-ostree db
+* rpm-ostree install
+* rpm-ostree uninstall