Added test for mixing kebab and snake case.
Added test for mixing kebab and snake case.

nalbion/swagger-js-codegen,adufilie/swagger-js-codegen,wcandillon/swagger-js-codegen,nalbion/swagger-js-codegen,adamstortz/swagger-js-codegen,adufilie/swagger-js-codegen,adamstortz/swagger-js-codegen,wcandillon/swagger-js-codegen