VOL-1460 Updated to use a voltha-protos repo as source for protos

Change-Id: I6e88fb3bb16f91941abaad2f0a810ebc5aa29f36
diff --git a/python/adapters/openolt/openolt_resource_manager.py b/python/adapters/openolt/openolt_resource_manager.py
index c784678..121f193 100644
--- a/python/adapters/openolt/openolt_resource_manager.py
+++ b/python/adapters/openolt/openolt_resource_manager.py
@@ -22,7 +22,7 @@
 from pyvoltha.common.config.config_backend import EtcdStore
 from openolt_flow_mgr import *
 
-from pyvoltha.protos import openolt_pb2
+from voltha_protos import openolt_pb2
 from openolt_platform import OpenOltPlatform