Add vagrant configurations for testing, readme update and fix to setting permissions for custom user

tests/Debian/Vagrantfile

@@ -0,0 +1,48 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+Vagrant.configure(2) do |config|
+  # The most common configuration options are documented and commented below.
+  # For a complete reference, please see the online documentation at
+  # https://docs.vagrantup.com.
+
+  # Every Vagrant development environment requires a box. You can search for
+  # boxes at https://atlas.hashicorp.com/search.
+  config.vm.box = "debian/stretch64"
+
+  # Disable automatic box update checking. If you disable this, then
+  # boxes will only be checked for updates when the user runs
+  # `vagrant box outdated`. This is not recommended.
+  # config.vm.box_check_update = false
+
+  # Create a private network, which allows host-only access to the machine
+  # using a specific IP.
+  config.vm.network "private_network", ip: "192.168.33.101"
+
+  # Share an additional folder to the guest VM. The first argument is
+  # the path on the host to the actual folder. The second argument is
+  # the path on the guest to mount the folder. And the optional third
+  # argument is a set of non-required options.
+  config.vm.synced_folder "../../", "/vagrant"
+
+  config.vm.provider "virtualbox" do |vb|
+    # Display the VirtualBox GUI when booting the machine
+    # Customize the amount of memory on the VM:
+    vb.memory = "2048"
+  end
+
+  # Disable the new default behavior introduced in Vagrant 1.7, to
+  # ensure that all Vagrant machines will use the same SSH key pair.
+  # See https://github.com/mitchellh/vagrant/issues/5005
+  config.ssh.insert_key = false
+
+  #
+  # Run automated test installation
+  #
+  config.vm.provision :shell, path: "../../xo-install.sh", args: "--run-test", run: 'always'
+
+end