change nstdId to nstId

Change-Id: Ic699a950aa0063ff33e4b9b61624fcfe0364ae57
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/osm_nbi/instance_topics.py b/osm_nbi/instance_topics.py
index b6e025f..c3471ea 100644
--- a/osm_nbi/instance_topics.py
+++ b/osm_nbi/instance_topics.py
@@ -783,8 +783,8 @@
             step = ""
             # look for nstd
             self.logger.info(str(slice_request))
-            step = "getting nstd id='{}' from database".format(slice_request.get("nstdId"))
-            _filter = {"id": slice_request["nstdId"]}
+            step = "getting nstd id='{}' from database".format(slice_request.get("nstId"))
+            _filter = {"_id": slice_request["nstId"]}
             _filter.update(BaseTopic._get_project_filter(session, write=False, show_all=True))
             nstd = self.db.get_one("nsts", _filter)
             nstd.pop("_admin", None)