Continuing adding deployable label

To roll back this change, revert the merge with `git revert -m 1 MERGE_SHA` and perform another deploy.

URLs
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QA Plan
-------
Check tests to make sure they cover well and finish successfully 

I am not liking how bloated this method is.  Can we break it up?

```ruby
def self.add_to_pull(pull_number, labels)
  label_names = build_labels(labels)
  GitHub.add_labels_to_pull(config.github_repo, pull_number, label_names)
end

def self.build_labels(label_names)
  Array(label_names).each {|label| first_or_create(label) }
end
```