Add users ftp delete function

[Boschung-Mecatronic-AG-Infrastructure]

Adding delete_file function for ftp

[cyberw]

Nice! Could you take the time to fix an issue: request_type should be just "FTP" and request_method should be the name of the call (using ftp cli names like send, get, delete etc)

Oh, and check the linting errors.

[Boschung-Mecatronic-AG-Infrastructure]

Hi, @cyberw are changes OK for you?

[cyberw]

Hi! Almost. I want you to set request_method too:

request_method should be the name of the call (using ftp cli names like send, get, delete etc)