Update test suite to properly validate REST function added in 7.x-2.x

Problem/Motivation

Behat tests need to be updated for 7.x-2.x release

Remaining tasks

features/admin/configure.feature
features/admin/drush.feature
features/admin/install.feature
features/admin/marketo_ma_user.feature
features/admin/marketo_ma_webform.feature
features/admin/permissions.feature
features/bootstrap/FeatureContext.php
features/travis-ci.feature
features/visitor/browse.feature