Upgraded Rails to 4.1.6

The path to Rails 4.1.7, just didn't want to jump ahead. Hence this
step.
Upgraded Rails to 4.1.7

Upgrade due to vulnerabilities.
Merge pull request #501 from ministryofjustice/rails-upgrade-4.1.7

Rails upgrade to 4.1.7
reduced spec running time by creating hash of id to element and using that to find elements instead of time-expensive capybara xpath evaluations
removed require of nokogiri patch
added click_find_address() method to postcode finder spec
removed sleep calls
Merge pull request #502 from ministryofjustice/speed-up-features

Reduced spec running time by creating hash of id to element
Merge branch 'master' into fee_account
Updated remote test address