Vagrant up expects machine data_dir to exist afterwards (#1298)

Ensure the machine data_dir is recreated after removal because vagrant
up expects the directory to exist even if there has been an exception
and the machine has been deleted subsequently.

spec/unit/action/clean_machine_folder_spec.rb

@@ -9,12 +9,18 @@ describe VagrantPlugins::ProviderLibvirt::Action::CleanMachineFolder do
   include_context 'unit'
 
   describe '#call' do
+    before do
+      FileUtils.touch(File.join(machine.data_dir, "box.meta"))
+    end
+
     context 'with default options' do
       it 'should verbosely remove the folder' do
         expect(ui).to receive(:info).with('Deleting the machine folder')
-        expect(FileUtils).to receive(:rm_rf).with(machine.data_dir, {:secure => true})
 
         expect(subject.call(env)).to be_nil
+
+        expect(File.exists?(machine.data_dir)).to eq(true)
+        expect(Dir.entries(machine.data_dir)).to match_array([".", ".."])
       end
     end
 
@@ -22,15 +28,17 @@ describe VagrantPlugins::ProviderLibvirt::Action::CleanMachineFolder do
       before do
         Dir.mktmpdir do |d|
           # returns a temporary directory that has been already deleted when running
-          expect(machine).to receive(:data_dir).and_return(d.to_s).exactly(2).times
+          expect(machine).to receive(:data_dir).and_return(d.to_s).exactly(3).times
         end
       end
 
       it 'should remove the folder' do
         expect(ui).to receive(:info).with('Deleting the machine folder')
-        expect(FileUtils).to receive(:rm_rf).with(machine.data_dir, {:secure => true})
 
         expect(subject.call(env)).to be_nil
+
+        expect(File.exists?(machine.data_dir)).to eq(true)
+        expect(Dir.entries(machine.data_dir)).to match_array([".", ".."])
       end
     end
 
@@ -39,9 +47,11 @@ describe VagrantPlugins::ProviderLibvirt::Action::CleanMachineFolder do
 
       it 'should quietly remove the folder' do
         expect(ui).to_not receive(:info).with('Deleting the machine folder')
-        expect(FileUtils).to receive(:rm_rf).with(machine.data_dir, {:secure => true})
 
         expect(subject.call(env)).to be_nil
+
+        expect(File.exists?(machine.data_dir)).to eq(true)
+        expect(Dir.entries(machine.data_dir)).to match_array([".", ".."])
       end
     end
   end