arangamani/jenkins_api_client — pull request #140 by riywo (2014-06-18 15:54:00+00:00)
Title: Add require yaml in cli helper

I tried to read credential info from yaml file using `jenkinscli` command and got the error below. I used ruby 2.1.0.

````ruby
uninitialized constant JenkinsApi::CLI::Helper::YAML (NameError)
````

This patch helps me avoid this error.