Move proto files into more globally accessible spot

lib/vagrant/machine.rb

@@ -1,6 +1,8 @@
 require_relative "util/ssh"
 require_relative "action/builtin/mixin_synced_folders"
 
+require 'proto/gen/plugin/core_pb'
+
 require "digest/md5"
 require "thread"
 

plugins/commands/serve/service/plugin_service.rb

@@ -1,7 +1,7 @@
 require "vagrant/plugin/v2/plugin"
 
-require_relative 'proto/gen/ruby-server_pb'
-require_relative 'proto/gen/ruby-server_services_pb'
+require 'proto/gen/ruby-server_pb'
+require 'proto/gen/ruby-server_services_pb'
 
 module VagrantPlugins
   module CommandServe

plugins/commands/serve/service/provider_service.rb

@@ -1,6 +1,6 @@
 
-require_relative 'proto/gen/plugin/plugin_pb'
-require_relative 'proto/gen/plugin/plugin_services_pb'
+require 'proto/gen/plugin/plugin_pb'
+require 'proto/gen/plugin/plugin_services_pb'
 require 'logger'
 
 module VagrantPlugins
@@ -42,7 +42,7 @@ module VagrantPlugins
         end
 
         def machine_arg_to_machine(req)
-          
+
         end
 
         def action_up_spec(req, _unused_call)