Resume recs addition

this adds the ability to call for resume recs through the api gem.  This requires an OAuth token which is usually generated through Services::OAuth in Consumer domain, but you can do this using any OAuth client including the CB 3scale ruby gem.
Your usage of single line blocks is a little inconsistent here. Some have no spacing between the braces and the content, some have a single on one side but not the other. My preferred way: spaces on all sides of the braces, all the time:
```ruby
let(:token) { Mocks::OAuthToken.new(content) }
it { expect(rec_call[0]).to be_a Cb::Models::RecommendedJob }
```
Just my preference. I would kindly request that you decide on your preference and then make these consistent :panda_face: