Changes to Create Datamate

added the new optional request property integrations/items/connection_ids

added the new optional request property integrations/items/connection_id

added the non-success response with the status 400

the memory_enabled request property default value changed from false to true

the knowledge_engine_enabled request property default value changed from false to true

removed the media type application/json for the response with the status 422

removed the non-success response with the status 400