Create fetch-puppet-module-output role

We'll be using this for puppet(-branch)-tarball jobs to publish to
artifacts site.

Change-Id: I4da68c8b1f89e2e04f4b94eebf29905c24aea474
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

roles/fetch-puppet-module-output/README.rst

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+Collect output from a puppet module build

roles/fetch-puppet-module-output/tasks/main.yaml

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+- name: Find tarballs in pkg folder
+  find:
+    file_type: file
+    paths: "src/{{ zuul.project.canonical_name }}/pkg"
+    patterns: "*.tar.gz"
+  register: result
+
+- name: Display stat for tarballs
+  stat:
+    path: "{{ item.path }}"
+  with_items: "{{ result.files }}"
+
+- name: Ensure artifacts directory exists
+  file:
+    path: "{{ zuul.executor.work_root }}/artifacts"
+    state: directory
+  delegate_to: localhost
+
+- name: Collect artifacts
+  synchronize:
+    dest: "{{ zuul.executor.work_root }}/artifacts/"
+    mode: pull
+    src: "{{ item.path }}"
+    verify_host: true
+  with_items: "{{ result.files }}"