clean up screen and tail_log references

Change-Id: I6bcfa09931ed1f70e071ccb16688c15c7ef2898f
diff --git a/lib/cinder b/lib/cinder
index 03328f3..ba5bd04 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -473,7 +473,7 @@
     fi
 }
 
-# start_cinder() - Start running processes, including screen
+# start_cinder() - Start running processes
 function start_cinder {
     local service_port=$CINDER_SERVICE_PORT
     local service_protocol=$CINDER_SERVICE_PROTOCOL
@@ -533,12 +533,9 @@
 # stop_cinder() - Stop running processes
 function stop_cinder {
     stop_process c-api
-
-    # Kill the cinder screen windows
-    local serv
-    for serv in c-bak c-sch c-vol; do
-        stop_process $serv
-    done
+    stop_process c-bak
+    stop_process c-sch
+    stop_process c-vol
 }
 
 # create_volume_types() - Create Cinder's configured volume types