Fix idempotence when installing the Windows package

The Windows package now includes a version string in its name, not just
"Chef Development Kit", so it was reinstalling on every Chef run.

libraries/resource_chef_dk_app_windows.rb

@@ -35,7 +35,8 @@ class ChefDkAppWindows < ChefDkApp
       action :install do
         case new_resource.source
         when :direct
-          package 'Chef Development Kit' do
+          ver = new_resource.version || package_metadata[:version]
+          package "Chef Development Kit v#{ver}" do
             source package_metadata[:url]
             checksum package_metadata[:sha256]
           end
@@ -45,7 +46,8 @@ class ChefDkAppWindows < ChefDkApp
             version new_resource.version unless new_resource.version.nil?
           end
         else
-          package 'Chef Development Kit' do
+          ver = new_resource.version || package_metadata[:version]
+          package "Chef Development Kit v#{ver}" do
             source new_resource.source.to_s
             checksum new_resource.checksum unless new_resource.checksum.nil?
           end

spec/resources/chef_dk_app/windows.rb

@@ -13,7 +13,8 @@
 
         shared_examples_for 'any property set' do
           it 'installs the correct Chef-DK package' do
-            expect(chef_run).to install_package('Chef Development Kit').with(
+            pkg = "Chef Development Kit v#{version || '1.2.3'}"
+            expect(chef_run).to install_package(pkg).with(
               source: "http://example.com/#{channel || 'stable'}/chefdk",
               checksum: '1234'
             )
@@ -76,7 +77,8 @@
           include_context description
 
           it 'installs the correct Chef-DK package' do
-            expect(chef_run).to install_package('Chef Development Kit').with(
+            pkg = "Chef Development Kit v#{version || '1.2.3'}"
+            expect(chef_run).to install_package(pkg).with(
               source: 'https://example.biz/cdk',
               checksum: '12345'
             )