Fix import paths.

Change-Id: I99a4fc39e3913c7278c8ac7daa67fca1c1c6e093
diff --git a/voltha_omci/omci_entities.py b/voltha_omci/omci_entities.py
index c5afd81..38d6942 100644
--- a/voltha_omci/omci_entities.py
+++ b/voltha_omci/omci_entities.py
@@ -21,9 +21,9 @@
 from scapy.fields import IntField, StrFixedLenField
 from scapy.packet import Packet
 
-from voltha.extensions.omci.omci_defs import OmciUninitializedFieldError, \
+from voltha_omci.omci.omci_defs import OmciUninitializedFieldError, \
     AttributeAccess, OmciNullPointer, EntityOperations
-from voltha.extensions.omci.omci_defs import bitpos_from_mask
+from voltha_omci.omci.omci_defs import bitpos_from_mask
 
 
 class EntityClassAttribute(object):