Remove duplicate debug option from keystone-all

The keystone server was started with the options like

 keystone-all ... -d --debug ...

The -d and --debug options are the same so one of them is
redundant.

This will make it less confusing if someone removes --debug and
thinks that debug is off, but debug is still on because they
didn't notice there was an extra -d.

Change-Id: I1ac977e6b12f1cc44f02b636c1bfb5c115b5b3e4
diff --git a/lib/keystone b/lib/keystone
index 712a509..29b9604 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -403,7 +403,7 @@
         screen_it key "cd $KEYSTONE_DIR && sudo tail -f /var/log/$APACHE_NAME/keystone"
     else
         # Start Keystone in a screen window
-        screen_it key "cd $KEYSTONE_DIR && $KEYSTONE_DIR/bin/keystone-all --config-file $KEYSTONE_CONF $KEYSTONE_LOG_CONFIG -d --debug"
+        screen_it key "cd $KEYSTONE_DIR && $KEYSTONE_DIR/bin/keystone-all --config-file $KEYSTONE_CONF $KEYSTONE_LOG_CONFIG --debug"
     fi
 
     echo "Waiting for keystone to start..."