(#9775) Move triggers object init in machine

Prior to this commit, the hyper-v provider called an action on a machine
that hadn't fully finished initializing. This commit fixes that by
moving up the initialization of the triggers object next to the rest of
the instance variables of the machine object.

lib/vagrant/machine.rb

@@ -110,6 +110,7 @@ module Vagrant
       @ui              = Vagrant::UI::Prefixed.new(@env.ui, @name)
       @ui_mutex        = Mutex.new
       @state_mutex     = Mutex.new
+      @triggers        = Vagrant::Plugin::V2::Trigger.new(@env, @config.trigger, self)
 
       # Read the ID, which is usually in local storage
       @id = nil
@@ -149,8 +150,6 @@ module Vagrant
       # Output a bunch of information about this machine in
       # machine-readable format in case someone is listening.
       @ui.machine("metadata", "provider", provider_name)
-
-      @triggers = Vagrant::Plugin::V2::Trigger.new(@env, @config.trigger, self)
     end
 
     # This calls an action on the provider. The provider may or may not

test/unit/vagrant/machine_test.rb

@@ -50,7 +50,8 @@ describe Vagrant::Machine do
 
   def new_provider_mock
     double("provider").tap do |obj|
-      allow(obj).to receive(:_initialize).and_return(nil)
+      allow(obj).to receive(:_initialize)
+        .with(provider_name, anything).and_return(nil)
       allow(obj).to receive(:machine_id_changed).and_return(nil)
       allow(obj).to receive(:state).and_return(Vagrant::MachineState.new(
         :created, "", ""))
@@ -76,6 +77,24 @@ describe Vagrant::Machine do
       expect(subject.id).to be_nil
     end
 
+    context "setting up triggers" do
+      before do
+        expect(provider).to receive(:_initialize) do |*args|
+          machine = args.last
+          @trigger_instance = machine.instance_variable_get(:@triggers)
+          true
+        end
+      end
+
+      it "should initialize the trigger object" do
+        subject = new_instance
+        expect(subject.instance_variable_get(:@triggers))
+          .to be_a(Vagrant::Plugin::V2::Trigger)
+        expect(subject.instance_variable_get(:@triggers))
+          .to eq(@trigger_instance)
+      end
+    end
+
     describe "as a base" do
       let(:base) { true}