Fix smoke tests race condition on summary text check
Fix smoke tests race condition on summary text check

Capybara current_url access doesn't wait for page to load, so the
URL comparison can fail due to page load timing issues.

Using `find` blocks the step until the element is present on a page,
at which point the page was loaded and the `current_url` should be
up to date.

alphagov/digitalmarketplace-functional-tests,alphagov/digitalmarketplace-functional-tests,alphagov/digitalmarketplace-functional-tests