run hostmanager before provisioners on up action

Fixes #73.

lib/vagrant-hostmanager/action/update_all.rb

@@ -23,8 +23,6 @@ module VagrantPlugins
         end
 
         def call(env)
-          # skip if machine is already active on up action
-          return @app.call(env) if @machine.id && env[:machine_action] == :up
           # skip if machine is not active on destroy action
           return @app.call(env) if !@machine.id && env[:machine_action] == :destroy
 

lib/vagrant-hostmanager/plugin.rb

@@ -17,7 +17,7 @@ module VagrantPlugins
       end
 
       action_hook(:hostmanager, :machine_action_up) do |hook|
-        hook.prepend(Action.update_all)
+        hook.after(Vagrant::Action::Builtin::Provision, Action.update_all)
       end
 
       action_hook(:hostmanager, :machine_action_destroy) do |hook|