fix 1132. Capture fs.sync exceptions at instantiation

Change-Id: I8d1200acb685d6fd494dd71d36fbe0568a6c50c4
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/osm_lcm/ns.py b/osm_lcm/ns.py
index 6af20dd..31c1f6f 100644
--- a/osm_lcm/ns.py
+++ b/osm_lcm/ns.py
@@ -1824,9 +1824,6 @@
         logging_text = "Task ns={} instantiate={} ".format(nsr_id, nslcmop_id)
         self.logger.debug(logging_text + "Enter")
 
-        # Sync from FSMongo
-        self.fs.sync()
-
         # get all needed from database
 
         # database nsrs record
@@ -1852,8 +1849,11 @@
             # wait for any previous tasks in process
             await self.lcm_tasks.waitfor_related_HA('ns', 'nslcmops', nslcmop_id)
 
+            stage[1] = "Sync filesystem from database"
+            self.fs.sync()  # TODO, make use of partial sync, only for the needed packages
+
             # STEP 0: Reading database (nslcmops, nsrs, nsds, vnfrs, vnfds)
-            stage[1] = "Reading from database,"
+            stage[1] = "Reading from database"
             # nsState="BUILDING", currentOperation="INSTANTIATING", currentOperationID=nslcmop_id
             db_nsr_update["detailed-status"] = "creating"
             db_nsr_update["operational-status"] = "init"