Added test file.
Create a function that returns a handler function for the create room request.
Added test function when username is empty and username is not included as parameter of the request.
Renamed file.
Removed 'fmt'.
Added tests on room name.
Added test on invalid method response message.
Added test on response status code as method not allowed.
Added test on username error response status code.
Added test on room name error response status code.
Refactored for responseString and responseStatusCode.
Added test on response content type.
Added test on response successful message.
Added on setting up the request header.
Added message content on error and success.
Added on setting up the request header.
Merge branch 'create-room-handler-unit-test' of https://github.com/mownier/moanhermes into create-room-handler-unit-test
Added test if a new room is successfully added to array 'rooms'.
Added test on status code when successful.
Added test on matching the parameter username's value to the username of the creator in the newly created room.