Fix spec

The spec should actually test closing of the context menu via ESC key. Because
of an error in the angular context menu implementation, the expected behavior
wasn't implemented initially.

spec/features/accessibility/work_packages/work_package_query_spec.rb

@@ -259,27 +259,17 @@ describe 'Work package index accessibility', :type => :feature do
           before do
             expect(page).to have_selector(target_link)
             element = find(target_link)
-            element.native.send_keys(:enter)
+            element.native.send_keys(:escape)
             expect(page).not_to have_selector(target_link)
           end
 
           it { expect(page).to have_selector(source_link + ':focus') }
-
-          after do
-            cleanup if defined?(cleanup)
-          end
         end
 
       end
     end
 
     describe 'work package context menu', js: true do
-      let(:cleanup) do
-        # ensure work package queried by context menu is fully loaded.
-        expect(page).to have_selector('.work-packages--details h2', text: work_package.subject,
-                                                                    visible: false)
-      end
-
       it_behaves_like 'context menu' do
         let(:target_link) { '#work-package-context-menu li.open a' }
         let(:source_link) { ".workpackages-table tr.issue td.id a" }