Added :chef_server provisioner shortcut

lib/vagrant/actions/vm/provision.rb

@@ -24,7 +24,8 @@ module Vagrant
           elsif provisioner.is_a?(Symbol)
             # We have a few hard coded provisioners for built-ins
             mapping = {
-              :chef_solo => Provisioners::ChefSolo
+              :chef_solo    => Provisioners::ChefSolo,
+              :chef_server  => Provisioners::ChefServer
             }
 
             provisioner_klass = mapping[provisioner]

test/vagrant/actions/vm/provision_test.rb

@@ -97,6 +97,10 @@ class ProvisionActionTest < Test::Unit::TestCase
         provisioner_expectation(:chef_solo, Vagrant::Provisioners::ChefSolo)
       end
 
+      should "set :chef_server to the ChefServer provisioner" do
+        provisioner_expectation(:chef_server, Vagrant::Provisioners::ChefServer)
+      end
+
       should "call prepare on the instance" do
         instance = mock("instance")
         instance.expects(:prepare).once