Added missing sudo when killing ns-metadata

Closes-bug: #1269982
Change-Id: Ib6b641a8d5c92fb4a8aaed6b5d7b63e66acd6bd9
diff --git a/lib/neutron b/lib/neutron
index 465b57c..4b280d1 100644
--- a/lib/neutron
+++ b/lib/neutron
@@ -505,7 +505,7 @@
         [ ! -z "$pid" ] && sudo kill -9 $pid
     fi
     if is_service_enabled q-meta; then
-        pkill -9 -f neutron-ns-metadata-proxy
+        sudo pkill -9 neutron-ns-metadata-proxy || :
     fi
 
     if is_service_enabled q-lbaas; then