Import WADL from secure URL

Hi

When trying to import WADL from a secure endpoint for an existing SOAPUI project, there is no option to add the endpoint credentials, and import failed due to Authorization error.

Reproducing the bug:
1. creating SOAPUI project
2. import Rest service by importing a WADL from secure endpoint
3. import failed due to Authorization error(HTTP status code: 401)
4. no option for adding endpoint credentials during WADL importing

Workaround:
1. access the endpoint
2. login using credentials
3. download the WADL locally
4. import the local WADL to SOAPUI project