Update engine.py to consider changes in common versioning

Change-Id: Iea2f726110555968cd45f3258b1842421bcd2590
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/osm_nbi/engine.py b/osm_nbi/engine.py
index ade9081..101167c 100644
--- a/osm_nbi/engine.py
+++ b/osm_nbi/engine.py
@@ -23,8 +23,8 @@
     fsmongo,
     msglocal,
     msgkafka,
-    _version as common_version,
 )
+from osm_common._version import version as common_version
 from osm_common.dbbase import DbException
 from osm_common.fsbase import FsException
 from osm_common.msgbase import MsgException