key_passphrase is ignored

[hwiese-boh]

The key-File has a passphrase it will be irgnord at connect function.

Exeption:
Could not establish SSH connection: private key file is encrypted

if self.key is not None:
       self.key = paramiko.RSAKey.from_private_key_file(self.key)

replace by

if self.key is not None:
       if self.key_passphrase is not None:
                self.key = paramiko.RSAKey.from_private_key_file(self.key, self.key_passphrase)
       else
                self.key = paramiko.RSAKey.from_private_key_file(self.key)