Stop neutron services more explicitly

After an unstack.sh several neutron services are left running. This
change tries to do a better (but not always successful) job of
stopping neutron agents.

stop_process does its own checking to see if a service is enabled
so we don't need to check before calling.

Change-Id: I8becbe9db56121cbc619a6d156b18f6c6d31a6e7

lib/neutron

@@ -749,13 +749,21 @@ function start_neutron_agents {
 # stop_neutron() - Stop running processes (non-screen)
 function stop_neutron {
     if is_service_enabled q-dhcp; then
+        stop_process q-dhcp
         pid=$(ps aux | awk '/[d]nsmasq.+interface=(tap|ns-)/ { print $2 }')
         [ ! -z "$pid" ] && sudo kill -9 $pid
     fi
+
+    stop_process q-svc
+    stop_process q-l3
+
     if is_service_enabled q-meta; then
         sudo pkill -9 -f neutron-ns-metadata-proxy || :
+        stop_process q-meta
     fi
 
+    stop_process q-agt
+
     if is_service_enabled q-lbaas; then
         neutron_lbaas_stop
     fi

lib/neutron_plugins/services/metering

@@ -23,7 +23,7 @@ function neutron_agent_metering_configure_agent {
 }
 
 function neutron_metering_stop {
-    :
+    stop_process q-metering
 }
 
 # Restore xtrace

lib/neutron_plugins/services/vpn

@@ -28,6 +28,7 @@ function neutron_vpn_stop {
     if [ -n "$pids" ]; then
         sudo kill $pids
     fi
+    stop_process q-vpn
 }
 
 # Restore xtrace