Update provider/virtualbox to allow paused state when booting vm

plugins/providers/virtualbox/action.rb

@@ -92,7 +92,7 @@ def self.action_boot
           b.use Customize, "pre-boot"
           b.use Boot
           b.use Customize, "post-boot"
-          b.use WaitForCommunicator, [:starting, :running]
+          b.use WaitForCommunicator, [:starting, :running, :paused]
           b.use Call, IsEnvSet, :cloud_init do |env, b2|
             if env[:result]
               b2.use CloudInitWait

test/unit/vagrant/action/builtin/wait_for_communicator_test.rb

@@ -0,0 +1,58 @@
+require File.expand_path("../../../../base", __FILE__)
+
+describe Vagrant::Action::Builtin::WaitForCommunicator do
+  let(:app) { lambda { |env| } }
+  let(:ui) { lambda { |env| } }
+  let(:env) { { machine: machine, ui: ui } }
+
+  let(:vm) do
+    double("vm",
+      communicator: nil
+    )
+  end
+
+  # Configuration mock
+  let(:config) { double("config", vm: vm) }
+
+  # Communicate mock
+  let(:communicate) { double("communicate") }
+
+  let(:state) { double("state") }
+
+  let(:ui) { Vagrant::UI::Silent.new }
+
+  let(:machine) do
+    double("machine",
+      config: config,
+      communicate: communicate, 
+      state: state,)
+  end
+
+  before do 
+    allow(vm).to receive(:boot_timeout).and_return(1)
+    allow(communicate).to receive(:wait_for_ready).with(1).and_return(true)
+  end
+
+  it "raise an error if a bad state is encountered" do
+    allow(state).to receive(:id).and_return(:stopped)
+
+    expect { described_class.new(app, env, [:running]).call(env) }.
+    to raise_error(Vagrant::Errors::VMBootBadState)
+  end
+
+  it "raise an error if the vm doesn't boot" do
+    allow(communicate).to receive(:wait_for_ready).and_return(false)
+    allow(state).to receive(:id).and_return(:running)
+
+    expect { described_class.new(app, env, [:running]).call(env) }.
+    to raise_error(Vagrant::Errors::VMBootTimeout)
+  end
+
+  it "succeed when a valid state is encountered" do
+    allow(communicate).to receive(:wait_for_ready).and_return(true)
+    allow(state).to receive(:id).and_return(:running)
+
+    expect { described_class.new(app, env, [:running]).call(env) }.
+    to_not raise_error
+  end
+end