YADE should support the keyboard-interactive authentication method for SFTP

Current Situation

YADE supports use of the SFTP protocol with the authentication methods:

• password:
• publickey

Desired Behavior

In addition to the above authentication methods a user should be able to use the authentication method:
keyboard-interactive: this method is used if no password is stored with the configuration but the user is prompted to enter a password on-the-fly.

YADE should have an option to set the UserInfo class that prompts for the password.

A default implementation of this class should be provided with the new class SOSVfsSFtpJCraftUserInfo that reads the password from stdin.

YADE Schema should support the keyboard-interactive authorization method. This option is supported by the YADE-Client on the command shell.