Issue 220 - Switch to Vagrant API version 2

Vagrantfile

+VAGRANTFILE_API_VERSION = "2"
+
 def define_standard_vm(config, host_name, ip)
   config.vm.define host_name do |config|
     config.vm.box = 'precise64'
     config.vm.box_url = 'http://files.vagrantup.com/precise64.box'
     config.vm.host_name = "#{host_name}.adblockplus.org"
-    config.vm.network :hostonly, ip, { nic_type: '82543GC' }
-    config.vm.customize ["modifyvm", :id, "--cpus", 1]
+    config.vm.network :private_network, ip: ip
+    config.vm.provider :virtualbox do |vb|
+      vb.customize ["modifyvm", :id, "--cpus", 1]
+    end
 
     config.vm.provision :shell, :inline => '
 if ! test -f /usr/bin/puppet; then
   sudo apt-get update && sudo apt-get install -y puppet
 fi'
 
     manifest_files = ['vagrant.pp', 'nodes.pp']
     manifest_files.each do |manifest_file|
       config.vm.provision :puppet do |puppet|
         puppet.options = ['--environment=development']
         puppet.manifests_path = 'manifests'
         puppet.manifest_file = manifest_file
         puppet.module_path = 'modules'
       end
     end
 
     yield(config) if block_given?
   end
 end
 
-Vagrant::Config.run do |config|
+Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
   define_standard_vm config, 'server4', '10.8.0.99'
   define_standard_vm config, 'server5', '10.8.0.100'
   define_standard_vm config, 'server6', '10.8.0.101'
   define_standard_vm config, 'server7', '10.8.0.102'
   define_standard_vm config, 'server10', '10.8.0.105' do |config|
-    config.vm.customize ["modifyvm", :id, "--memory", 1024]
+    config.vm.provider :virtualbox do |vb|
+      vb.customize ["modifyvm", :id, "--memory", 1024]
+    end
   end
   define_standard_vm config, 'server11', '10.8.0.106'
   define_standard_vm config, 'server12', '10.8.0.107'
   define_standard_vm config, 'server15', '10.8.0.110'
   define_standard_vm config, 'server19', '10.8.0.114'
   define_standard_vm config, 'notification1', '10.8.0.118'
   define_standard_vm config, 'notification2', '10.8.0.119'
   define_standard_vm config, 'filter1', '10.8.0.120'
   define_standard_vm config, 'filter2', '10.8.0.121'
   define_standard_vm config, 'filter3', '10.8.0.122'
@@ skipping 13 matching lines @@
   define_standard_vm config, 'filter10', '10.8.0.136'
   define_standard_vm config, 'filter11', '10.8.0.137'
   define_standard_vm config, 'filter12', '10.8.0.138'
   define_standard_vm config, 'filter13', '10.8.0.139'
   define_standard_vm config, 'filter14', '10.8.0.140'
   define_standard_vm config, 'filter15', '10.8.0.141'
   define_standard_vm config, 'filter16', '10.8.0.142'
   define_standard_vm config, 'filter17', '10.8.0.143'
   define_standard_vm config, 'filter18', '10.8.0.144'
 end