using 'docker' as host

testing/registrar_test.py

@@ -33,7 +33,7 @@ def identifiers():
 @pytest.fixture
 def sftp_connection():
 
-    transport = paramiko.Transport(('localhost',2222))
+    transport = paramiko.Transport(('docker',2222))
     transport.connect(username='eox', password='password')
     with paramiko.SFTPClient.from_transport(transport) as sftp:
         yield sftp