fix typo change admin to _admin

Change-Id: Iec9cf72554a94bcee45708109e6d36dbaefc56c6
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/osm_lcm/ns.py b/osm_lcm/ns.py
index 7bfb898..d7277e7 100644
--- a/osm_lcm/ns.py
+++ b/osm_lcm/ns.py
@@ -801,7 +801,7 @@
             while time() <= start_deploy + self.total_deploy_timeout:
                 desc = await RO.show("ns", RO_nsr_id)
                 ns_status, ns_status_info = RO.check_ns_status(desc)
-                db_nsr_update["admin.deployed.RO.nsr_status"] = ns_status
+                db_nsr_update["_admin.deployed.RO.nsr_status"] = ns_status
                 if ns_status == "ERROR":
                     raise ROclient.ROClientException(ns_status_info)
                 elif ns_status == "BUILD":