Update to clear page cache before each test run

This protects against potential cache polution from other tests that was
previously observed with Whitehall. As such we have switched these to
use the old method rather than the workaround

spec/spec_helper.rb

@@ -113,6 +113,10 @@
 =end
 
   config.add_setting :reload_page_wait_time, default: 60
+
+  config.before(:each) do
+    page.driver.clear_memory_cache
+  end
 end
 
 Capybara.configure do |config|

spec/whitehall/publishing_document_spec.rb

@@ -33,7 +33,7 @@ def then_i_can_view_it_on_gov_uk
   def and_it_is_displayed_on_the_publication_finder
     publication_finder = find('a', text: "Publications", match: :first)[:href]
     reload_url_until_match(publication_finder, :has_text?, title)
-    click_link("Publications", match: :first)
+    visit(publication_finder)
 
     expect_rendering_application("whitehall")
     expect(page).to have_content(title)

spec/whitehall/updating_document_spec.rb

@@ -37,7 +37,7 @@ def then_i_can_view_the_updated_content_on_gov_uk
   def and_it_is_updated_on_the_publication_finder
     publication_finder = find('a', text: "Publications", match: :first)[:href]
     reload_url_until_match(publication_finder, :has_text?, updated_title)
-    click_link("Publications", match: :first)
+    visit(publication_finder)
 
     expect_rendering_application("whitehall")
     expect(page).to have_content(updated_title)