Add upload-puppetforge role

Adds a new role that can be used to upload a
built puppet module tarball to forge.puppet.com

Change-Id: I16c4da93592dc92b84ff8ad9540c75c7d3b39a91

roles/upload-puppetforge/README.rst

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+Upload puppet module to Puppet Forge
+
+**Role Variables**
+
+  .. zuul:rolevar:: puppet_module_dir
+     :default: {{ zuul.project.src_dir }}
+
+     The folder where the puppet module code is that it can
+     switch folder to.
+
+  .. zuul:rolevar:: blacksmith_forge_url
+     :default: https://forgeapi.puppetlabs.com
+
+     The URL to the Puppet Forge API.
+
+  .. zuul:rolevar:: blacksmith_forge_username
+
+     Username to use to log in to Puppet Forge.
+
+  .. zuul:rolevar:: blacksmith_forge_password
+
+     Password to use to log in to Puppet Forge.

roles/upload-puppetforge/defaults/main.yaml

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+---
+puppet_module_dir: "{{ zuul.project.src_dir }}"
+blacksmith_forge_url: "https://forgeapi.puppetlabs.com"

roles/upload-puppetforge/tasks/main.yaml

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+- name: Install required gems
+  gem:
+    name: "{{ item }}"
+  with_items:
+    - rake
+    - puppetlabs_spec_helper
+    - puppet-blacksmith
+
+- name: Install new Rakefile
+  copy:
+    content: "require 'puppet_blacksmith/rake_tasks'"
+    dest: "{{ puppet_module_dir }}/Rakefile"
+
+- name: Publish puppet module
+  command: "rake module:push"
+  args:
+    chdir: "{{ puppet_module_dir }}"
+  environment:
+    BLACKSMITH_FORGE_URL: "{{ blacksmith_forge_url }}"
+    BLACKSMITH_FORGE_USERNAME: "{{ blacksmith_forge_username }}"
+    BLACKSMITH_FORGE_PASSWORD: "{{ blacksmith_forge_password }}"