Merge branch 'gitlab-qa-reset-local-store' into 'master'

Reset local storage between qa tests

Closes gitlab-qa#303

See merge request gitlab-org/gitlab-ce!20844

qa/qa/runtime/browser.rb

@@ -72,6 +72,7 @@ module QA
           Capybara::Selenium::Driver.new(
             app,
             browser: :chrome,
+            clear_local_storage: true,
             desired_capabilities: capabilities,
             options: options
           )