Fix browser's download path configuration

The CI build can't find the downloaded file and fails like:

```
2) enterprise fee summaries csv downloads smoke test for generation of report based on permissions when logged in as enterprise user generates file with data for the enterprise
     Failure/Error: sleep 0.1 until downloaded?

     Timeout::Error:
       execution expired
     # ./spec/support/downloads_helper.rb:34:in `sleep'
     # ./spec/support/downloads_helper.rb:34:in `block in wait_for_download'
     # ./spec/support/downloads_helper.rb:33:in `wait_for_download'
     # ./spec/support/downloads_helper.rb:11:in `downloaded_filename'
     # ./engines/order_management/spec/features/order_management/reports/enterprise_fee_summaries_spec.rb:119:in `block (5 levels) in <top (required)>'
     # ./engines/order_management/spec/features/order_management/reports/enterprise_fee_summaries_spec.rb:80:in `block (4 levels) in <top (required)>'
     # ./spec/support/downloads_helper.rb:22:in `with_empty_downloads_folder'
     # ./engines/order_management/spec/features/order_management/reports/enterprise_fee_summaries_spec.rb:80:in `block (3 levels) in <top (required)>'
```

.github/workflows/build.yml

@@ -8,7 +8,7 @@ env:
   DISABLE_KNAPSACK: true
 
 jobs:
-  test-models:
+  test-non-spree-models:
     runs-on: ubuntu-18.04
     services:
       postgres:
@@ -47,7 +47,48 @@ jobs:
           bundle exec rake db:schema:load RAILS_ENV=test
 
       - name: Run tests
-        run: bundle exec rspec spec/models
+        run: bundle exec rspec spec/models --exclude-pattern "spec/models/spree/*"
+
+  test-spree-models:
+    runs-on: ubuntu-18.04
+    services:
+      postgres:
+        image: postgres:10
+        ports: ["5432:5432"]
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        env:
+          POSTGRES_DB: open_food_network_test
+          POSTGRES_USER: ofn
+          POSTGRES_PASSWORD: f00d
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14.15.5'
+
+      - name: Install JS dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Set up application.yml
+        run: cp config/application.yml.example config/application.yml
+
+      - name: Set up database
+        run: |
+          bundle exec rake db:create RAILS_ENV=test
+          bundle exec rake db:schema:load RAILS_ENV=test
+
+      - name: Run tests
+        run: bundle exec rspec spec/models/spree
 
   test-admin-features:
     runs-on: ubuntu-18.04

spec/spec_helper.rb

@@ -59,9 +59,11 @@ Capybara.register_driver :chrome do |app|
   options = Selenium::WebDriver::Chrome::Options.new(
     args: %w[headless disable-gpu no-sandbox window-size=1280,768]
   )
+  options.add_preference(:download, default_directory: Rails.root.join("tmp", "downloads").to_s)
+
   Capybara::Selenium::Driver
     .new(app, browser: :chrome, options: options)
-    .tap { |driver| driver.browser.download_path = DownloadsHelper.path.to_s }
+    .tap { |driver| driver.browser.download_path = Rails.root.join("tmp", "downloads").to_s }
 end
 
 Capybara.default_max_wait_time = 30