HandleCreateServiceSuccessfully creates an HTTP handler at `/services` on the test handler mux that tests service creation.

HandleGetServiceSuccessfully creates an HTTP handler at `/services` on the test handler mux that responds with a single service.

HandleListServicesSuccessfully creates an HTTP handler at `/services` on the test handler mux that responds with a list of two services.

HandleUpdateServiceSuccessfully creates an HTTP handler at `/services` on the test handler mux that tests service update.

CreateRequest provides the input to a Create request.

GetOutput provides a Get result.

ListOutput provides a single page of Service results.

UpdateOutput provides an update result.

UpdateRequest provides the input to as Update request.

ExpectedServicesSlice is the slice of services to be returned from ListOutput.

FirstService is the first service in the List request.

SecondService is the second service in the List request.

SecondServiceUpdated is the SecondService should look after an Update.