Webapi-Swagger : Conditional Imports of Global Type Modules

[kahlil29]

There are 3 (possible) Global Types modules that could be generated.

1. Definitions
2. Responses
3. Params

All 3 could be potentially empty (most likely Responses and/or Params) If they are empty (module would not be generated) OR if the local Types module does not need or use any Type(s) defined in these Global modules then there is no need to import them.