Add options to automatically update the API JSON Spec with the correct host name (API Gateway: staging or prod URLs) and to use the extension for auto-filling of the API keys (x-data-threescale-name field).
The following should be done
- modify the "server"/url where the API is
- add the auth stuff
- when the spec already has the auth parameters in it, make sure we don't "on the fly" add them a second time
See https://docs.google.com/document/d/1rEm2XCCQ2A1L_7R1afe66ngb_-9GjTClhah_UBqqmXA for possible scenarios