Create ansible-galaxy-import role

Ansible Galaxy has the ability for user to import roles into it. This
role will leverage the ansible-galaxy CLI command to do this.  We'll
login via a github token (sorry only method) then trigger an import on
the remote API server.

Change-Id: I959c3051403929ef4927cf23fdbef14b45294aa2
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

roles/ansible-galaxy-import/README.rst

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+Import ansible roles into ansible galaxy
+
+**Role Variables**
+
+.. zuul:rolevar:: ansible_galaxy_branch
+   :default: zuul.branch
+
+   The name of a branch to import.
+
+.. zuul:rolevar:: ansible_galaxy_executable
+   :default: ansible-galaxy
+
+   Path to ansible-galaxy executable.
+
+.. zuul:rolevar:: ansible_galaxy_info
+
+   Complex argument which contains the information about the Ansible
+   Galaxy server as well as the authentication information needed. It
+   is expected that this argument comes from a `Secret`.
+
+  .. zuul:rolevar:: server
+     :default: https://galaxy.ansible.com
+
+     The API server destination.
+
+  .. zuul:rolevar:: token
+
+     Identify with github token rather than username and password.

roles/ansible-galaxy-import/defaults/main.yaml

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+---
+ansible_galaxy_branch: "{{ zuul.branch }}"
+ansible_galaxy_executable: ansible-galaxy
+ansible_galaxy_server: "{{ ansible_galaxy_info.server|default('https://galaxy.ansible.com') }}"

roles/ansible-galaxy-import/tasks/main.yaml

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+- name: Login into Ansible Galaxy
+  command: "{{ ansible_galaxy_executable }} -s {{ ansible_galaxy_server }} login --github-token {{ galaxy_info.token }}"
+  no_log: True
+
+- name: Import role into Ansible Galaxy
+  command: "{{ ansible_galaxy_executable }} -s {{ ansible_galaxy_server }} import --branch {{ ansible_galaxy_branch }} {{ zuul.project['name'].split('/')[0] }} {{ zuul.project['short_name'] }}"