Install provisioning tools in the VM

- Added --diff flag
- Installed virt-manager and ansible
- Removed duplicate software install task
- Removed irrelevant GUI task

Vagrantfile

@@ -46,5 +46,6 @@ Vagrant.configure("2") do |config|
     ENV['ANSIBLE_ROLES_PATH'] = File.dirname(__FILE__) + "/roles"
     ansible.compatibility_mode = "2.0"
     ansible.playbook = "site-vagrant.yml"
+    ansible.raw_arguments  = ["--diff"]
   end
 end