Run syncdb command without user input.

Change-Id: Ic21455e640ece9d77409a2589c531d124f7d2a1b
diff --git a/stack.sh b/stack.sh
index 513f8be..87865dc 100755
--- a/stack.sh
+++ b/stack.sh
@@ -899,7 +899,7 @@
     # Initialize the horizon database (it stores sessions and notices shown to
     # users).  The user system is external (keystone).
     cd $HORIZON_DIR
-    python manage.py syncdb
+    python manage.py syncdb --noinput
     cd $TOP_DIR
 
     # Create an empty directory that apache uses as docroot