Prevent 422 status code with exception for invalid CSRF tokens

When the user tries to submit a form with invalidated session, this fix
will prevent it from raising an error
upgrade to jasmine 2.0.2 and jasmine-2 branch of guard-jasmine
Merge pull request #429 from ministryofjustice/upgrade-jasmine

Upgrade to jasmine 2.0.2
Increase poltergeist timeout, prevents some intermittent failures
Log to Logstash when authenticity toke is invalid

Configured it for Test environment so all the tests pass as expected.
Merge pull request #427 from ministryofjustice/76785866-csrf

Prevent 422 status code with exception for invalid CSRF tokens
Merge pull request #430 from ministryofjustice/test-timeout

Increase poltergeist timeout, prevents some intermittent failures
Removing duplication for Code Climate
Copy change, renamed the button text

As per ticket:
https://www.pivotaltracker.com/story/show/77186876
Merge pull request #432 from ministryofjustice/green-button

Copy change, renamed the button text
further refactoring
temp patch for the CSS for live phase
Merge pull request #433 from ministryofjustice/live-phase-patch

temp patch for the CSS for live phase
Merge pull request #431 from ministryofjustice/remove-duplication

Removing duplication for Code Climate
Merge branch 'master' into num_claimants_js_refactor

* master:
  temp patch for the CSS for live phase
  further refactoring
  Copy change, renamed the button text
  Removing duplication for Code Climate
  Log to Logstash when authenticity toke is invalid
  Increase poltergeist timeout, prevents some intermittent failures
  upgrade to jasmine 2.0.2 and jasmine-2 branch of guard-jasmine
  Prevent 422 status code with exception for invalid CSRF tokens

Conflicts:
	app/assets/stylesheets/claims-global.css.sass
	spec/features/form_validation_errors_spec.rb