Create the vendor dir and pass the path to bundler

The vendor directory needs to exist in the release_path so the symlink
can be created.

The path vendor/bundle should be passed into the bundle command so it
gets installed into the directory under the symlink and available across
deployment. Bundler will do the right thing if gems need to be updated.

providers/rails.rb

@@ -60,6 +60,11 @@
       group new_resource.group
       mode '0755'
     end
+    directory "#{new_resource.release_path}/vendor" do
+      owner new_resource.owner
+      group new_resource.group
+      mode '0755'
+    end
     link "#{new_resource.release_path}/vendor/bundle" do
       to "#{new_resource.path}/shared/vendor_bundle"
     end
@@ -72,7 +77,7 @@
       # Check for a Gemfile.lock
       bundler_deployment = ::File.exists?(::File.join(new_resource.release_path, "Gemfile.lock"))
     end
-    execute "bundle install #{bundler_deployment ? "--deployment " : ""}--without #{common_groups}" do
+    execute "bundle install --path=vendor/bundle #{bundler_deployment ? "--deployment " : ""}--without #{common_groups}" do
       cwd new_resource.release_path
       user new_resource.owner
       environment new_resource.environment