[BUG] Log file does always records an empty string for Response Body field.

[OdedDvir]

I have set "EnableHttpsLogging": true in middleware.json, and I can see the RequestBody content in the log file, but the ResponseBody always returns an empty string.

[Datta Sai Krishna]

#861 Pull Request Created to fix Response Body Empty String

[Mukesh Murugan]

Please pull the latest from main branch and re-test this scenario. @OdedDvir