Fix local neutron folder path in ovn/sparse/Vagrantfile

Change-Id: I688d1e83ba07b444290f35c78e4a06e1edaac428

vagrant/ovn/sparse/.gitignore

@@ -0,0 +1 @@
+.vagrant/

vagrant/ovn/sparse/Vagrantfile

@@ -17,7 +17,7 @@ Vagrant.configure(2) do |config|
 
   config.vm.synced_folder ".", "/vagrant", disabled: true
   config.vm.synced_folder File.expand_path(".."), "/vagrant"
-  config.vm.synced_folder File.expand_path("../.."), "/home/vagrant/neutron"
+  config.vm.synced_folder File.expand_path("../../.."), "/home/vagrant/neutron"
 
   # Use the ipaddr library to calculate the netmask of a given network
   net = IPAddr.new vagrant_config['provider_network']