Fix missing Vagrant box

Change-Id: Ic567caeabd984d5e8be440055761e2084640f551
diff --git a/scripts/cord-bootstrap.sh b/scripts/cord-bootstrap.sh
index 969ffc2..7ebe291 100755
--- a/scripts/cord-bootstrap.sh
+++ b/scripts/cord-bootstrap.sh
@@ -120,12 +120,12 @@
 
   if ! vagrant box list | grep -q ubuntu/trusty64.*libvirt
   then
-    add_box ubuntu/trusty64
+    add_box ubuntu/trusty64 https://app.vagrantup.com/ubuntu/boxes/trusty64
   fi
 }
 
 function add_box() {
-  vagrant box list | grep $1 | grep virtualbox || vagrant box add $1
+  vagrant box list | grep $1 | grep virtualbox || vagrant box add $2
   vagrant box list | grep $1 | grep libvirt || vagrant mutate $1 libvirt --input-provider virtualbox
 }