Merge pull request #572 from edx/will/verify-release-devstack

Print error message if edx_ansible not installed in base box

vagrant/release/devstack/Vagrantfile

@@ -2,6 +2,10 @@ MEMORY = 2048
 CPU_COUNT = 2
 
 $script = <<SCRIPT
+if [ ! -d /edx/app/edx_ansible ]; then
+    echo "Error: Base box is missing provisioning scripts." 1>&2
+    exit 1
+fi
 source /edx/app/edx_ansible/venvs/edx_ansible/bin/activate
 cd /edx/app/edx_ansible/edx_ansible/playbooks
 ansible-playbook -i localhost, -c local vagrant-devstack.yml