migrate UpdateHost action to use Updater class

lib/vagrant-hostmanager/action/update_host.rb

@@ -1,24 +1,25 @@
-require 'vagrant-hostmanager/hosts_file'
+require 'vagrant-hostmanager/hosts_file/updater'
 require 'vagrant-hostmanager/util'
 
 module VagrantPlugins
   module HostManager
     module Action
       class UpdateHost
-        include HostsFile
 
         def initialize(app, env)
           @app = app
-          @global_env = env[:global_env]
-          @provider = env[:provider]
-          @config = Util.get_config(@global_env)
+          
+          global_env = env[:global_env]
+          @config = Util.get_config(global_env)
+          @updater = HostsFile::Updater.new(global_env, env[:provider])
+          
           @logger = Log4r::Logger.new('vagrant::hostmanager::update_host')
         end
 
         def call(env)
           if @config.hostmanager.manage_host?
             env[:ui].info I18n.t('vagrant_hostmanager.action.update_host')
-            update_host
+            @updater.update_host
           end
 
           @app.call(env)
@@ -26,5 +27,4 @@ module VagrantPlugins
       end
     end
   end
-end
-
+end