[COMAC-228] Update progran-synchronizer based on XOS 3.0

Change-Id: I8316d0c58602c86a9df3f02501268877596770d6
diff --git a/xos/synchronizer/steps/sync_imsi_back.py b/xos/synchronizer/steps/sync_imsi_back.py
index e81232c..a462c23 100644
--- a/xos/synchronizer/steps/sync_imsi_back.py
+++ b/xos/synchronizer/steps/sync_imsi_back.py
@@ -20,7 +20,7 @@
 import datetime
 import time
 
-from xossynchronizer.steps.SyncInstanceUsingAnsible import SyncStep
+from xossynchronizer.steps.syncstep import SyncStep
 from xossynchronizer.modelaccessor import MCordSubscriberInstance
 
 from xosconfig import Config