Fix Capybara/VisibilityMatcher RuboCop offenses

`visible: false` is now `visible: :hidden` and `visible: true` is now
`visible: :visible`.

src/api/spec/features/webui/image_templates_spec.rb

@@ -30,10 +30,10 @@
       end
 
       expect(page).to have_text(package1.title)
-      expect(page).to have_selector("input[data-package='#{package1}']:checked", visible: false)
-      expect(page).to have_selector("input[data-package='#{package2}']:not(:checked)", visible: false)
-      expect(page).to have_selector("input[data-package='#{package3}']:not(:checked)", visible: false)
-      expect(page).to have_selector("input[data-package='#{kiwi_package}']:not(:checked)", visible: false)
+      expect(page).to have_selector("input[data-package='#{package1}']:checked", visible: :hidden)
+      expect(page).to have_selector("input[data-package='#{package2}']:not(:checked)", visible: :hidden)
+      expect(page).to have_selector("input[data-package='#{package3}']:not(:checked)", visible: :hidden)
+      expect(page).to have_selector("input[data-package='#{kiwi_package}']:not(:checked)", visible: :hidden)
 
       expect(page).to have_field('target_package', with: package1)
       within :xpath, "//input[@data-package='#{package2}']/../label" do
@@ -59,10 +59,10 @@
       end
 
       expect(page).to have_text(package1.title)
-      expect(page).to have_selector("input[data-package='#{package1}']:checked", visible: false)
-      expect(page).to have_selector("input[data-package='#{package2}']:not(:checked)", visible: false)
-      expect(page).to have_selector("input[data-package='#{package3}']:not(:checked)", visible: false)
-      expect(page).to have_selector("input[data-package='#{kiwi_package}']:not(:checked)", visible: false)
+      expect(page).to have_selector("input[data-package='#{package1}']:checked", visible: :hidden)
+      expect(page).to have_selector("input[data-package='#{package2}']:not(:checked)", visible: :hidden)
+      expect(page).to have_selector("input[data-package='#{package3}']:not(:checked)", visible: :hidden)
+      expect(page).to have_selector("input[data-package='#{kiwi_package}']:not(:checked)", visible: :hidden)
 
       expect(page).to have_field('target_package', with: package1)
       within :xpath, "//input[@data-package='#{kiwi_package}']/../label" do

src/api/spec/features/webui/maintained_projects_spec.rb

@@ -27,31 +27,31 @@
         visit project_maintained_projects_path(project_name: maintenance_project.name)
 
         expect(page).to have_text('Maintained Projects')
-        expect(page).to have_selector('#new-maintenance-project-modal', visible: false)
-        expect(page).to have_selector('#delete-maintained-project-modal', visible: false)
+        expect(page).to have_selector('#new-maintenance-project-modal', visible: :hidden)
+        expect(page).to have_selector('#delete-maintained-project-modal', visible: :hidden)
       end
 
       scenario 'click on add new project' do
         login admin_user
         visit project_maintained_projects_path(project_name: maintenance_project.name)
 
-        expect(page).to have_selector('#new-maintenance-project-modal', visible: false)
+        expect(page).to have_selector('#new-maintenance-project-modal', visible: :hidden)
         click_link('Add Project to Maintain')
 
-        expect(page).to have_selector('#new-maintenance-project-modal', visible: true)
-        expect(page).to have_selector('#delete-maintained-project-modal', visible: false)
+        expect(page).to have_selector('#new-maintenance-project-modal', visible: :visible)
+        expect(page).to have_selector('#delete-maintained-project-modal', visible: :hidden)
       end
 
       scenario 'click on delete project' do
         login admin_user
         visit project_maintained_projects_path(project_name: maintenance_project.name)
 
-        expect(page).to have_selector('#new-maintenance-project-modal', visible: false)
+        expect(page).to have_selector('#new-maintenance-project-modal', visible: :hidden)
 
         click_link('Delete Project')
 
-        expect(page).to have_selector('#new-maintenance-project-modal', visible: false)
-        expect(page).to have_selector('#delete-maintained-project-modal', visible: true)
+        expect(page).to have_selector('#new-maintenance-project-modal', visible: :hidden)
+        expect(page).to have_selector('#delete-maintained-project-modal', visible: :visible)
       end
 
       scenario 'delete project' do