Move import/export facilities to their own folder

service/port/__init__.py

@@ -0,0 +1,2 @@
+from .efs import EfsPort
+from .port import Port, IPortUser

service/port/port.py

@@ -51,7 +51,7 @@ from utils.strfunctions import sequential_rep, replace_ltgt
 from abc import ABCMeta, abstractmethod
 
 from service.esi import Esi
-from service.eftPort import EftPort, SLOT_ORDER as EFT_SLOT_ORDER
+from service.port.eft import EftPort, SLOT_ORDER as EFT_SLOT_ORDER
 from collections import OrderedDict