Implement screen process stop() function

Implements screen process stop in ceilometer, cinder, glance, heat, n-vol

Change-Id: Ic5e02926f026d0e6f4b39846bfe77634dd414c60
diff --git a/lib/glance b/lib/glance
index 44990f1..4cc6253 100644
--- a/lib/glance
+++ b/lib/glance
@@ -169,7 +169,7 @@
     fi
 }
 
-# stop_glance() - Stop running processes (non-screen)
+# stop_glance() - Stop running processes
 function stop_glance() {
     # Kill the Glance screen windows
     screen -S $SCREEN_NAME -p g-api -X kill