Include imports for Request configuration classes and model classes for snippets that make use of the same #130

When a snippet makes use of a model class, or a request configuration class, not having these in in an include line in the snippets throws an error.
Customers have to go through the painful experience of manually looking for the appropriate path and including or relying on IDE hints to fix the errors until all needed imports are included:

• Include path to the model class or namespace to solve the missing class error.
• Include path to request configuration class for models that use request configuration to remove missing class error and enhance copy and paste experience.
• Change Raptor import mechanism so that Raptor tests rely on imports within the snippets