fixed generating a description to golang comments for enum type

[zdebra]

Hello, I've created a bug fix for plugin modelgen. I and my team have recently started using the tool in production and we really like it.

I wanted to dig into the code by submitting an easy fix of something that I found out. When models are generated from GraphQL schema, a description is used as golang comments. It works fine for all GraphQL types but enum. It worked in a way that the description was formatted into a single word CamelCased. I've added test cases and fixed it by removing calling go in a template pipe.

Those tests from me could be more sophisticated as I am checking only for the number of words in a comment.

Let me know if this is welcomed. I would like to contribute more.

[coveralls]

Coverage decreased (-0.2%) to 61.677% when pulling 446c3df on zdebra:master into 414a4d3 on 99designs:master.

[vektah]

😂 thanks.