Add ruby-lint test to test case
Add ruby-lint test to test case

Unfortunately not all the checks are turned on at this time. If there is
a ruby-lint hacker who can fix this, awesome! Until then, this is still
better than nothing.

br0ziliy/oh-my-vagrant,LalatenduMohanty/oh-my-vagrant,purpleidea/oh-my-vagrant,purpleidea/oh-my-vagrant,br0ziliy/oh-my-vagrant,mairin/oh-my-vagrant,LalatenduMohanty/oh-my-vagrant,mairin/oh-my-vagrant,mairin/oh-my-vagrant,geekcheng/oh-my-vagrant,br0ziliy/oh-my-vagrant,purpleidea/oh-my-vagrant,geekcheng/oh-my-vagrant,geekcheng/oh-my-vagrant,LalatenduMohanty/oh-my-vagrant