Extends generator CLI tool to transform a folder with JSON specs to ruby files

* a second CLI command transforms the JSON spec files from a folder to an output folder
Adds 'list' parameter type when transforming JSON spec files
Removes unused method
Adds helper function to use hash conforming to JSON spec
DSL allows to set enum value to an array as well

* adds sample JSON and specs to check behaviour
DSL allows to set parameters duration and list now

Default parameter type is set to String, if there are any incomplete parameters given

* adds specs