Issues 5.8.0 for Swagger Web Api Test

1. If you import via Swagger url, the api url will end with null
for exmaple:
after imported, http://localhost/api/auth/token will change to http://locallhostnull/api/auth/token

2. http body format: x-www-form-urlencoded, use grant_type=password to auth user, it will always response “unspported grant type”, the request in backend must have some mistake I think, because SoapUi and Postman both are OK.

about #2, after check the fiddle detail info, I found the body content is null, content-length is zero.