Use either the 8.x or 9.x version of the Behat Drupal Extension depen…

…ding on which version of Drupal we are using.

.travis.yml

@@ -37,12 +37,12 @@ install:
   # For Drupal 8 install the behat drush endpoint.
   # Pins symfony/dependency-injection to match core.
   # @see https://github.com/jhedstrom/drupalextension/issues/413
-  - test ${DRUPAL_VERSION} -ne 8 || composer require --prefer-source drupal/drupal-driver drush/drush:^9.0.0-dev symfony/dependency-injection:3.4.4 && (git clone https://github.com/drush-ops/behat-drush-endpoint.git drush/Commands/contrib/behat-drush-endpoint)
+  - test ${DRUPAL_VERSION} -ne 8 || composer require --prefer-source drupal/drupal-driver drush/drush:^9.0.0-dev symfony/dependency-injection:3.4.4 && (git clone --branch=9.x https://github.com/drush-ops/behat-drush-endpoint.git drush/Commands/contrib/behat-drush-endpoint)
   - composer install
   # Install drush globally.
   - (test ${DRUPAL_VERSION} -ne 8 && composer global require drush/drush:~8.0 drupal/drupal-driver) || composer global require drush/drush:^9.0.0-dev
   # Install the Behat Drush Endpoint for Drupal 7 tests.
-  - test ${DRUPAL_VERSION} -ne 7 || (git clone https://github.com/drush-ops/behat-drush-endpoint.git drush/behat-drush-endpoint && (cd drush/behat-drush-endpoint && composer install && cd -))
+  - test ${DRUPAL_VERSION} -ne 7 || (git clone --branch=8.x https://github.com/drush-ops/behat-drush-endpoint.git drush/behat-drush-endpoint && (cd drush/behat-drush-endpoint && composer install && cd -))
   # Pin node version.
   # @see http://austinpray.com/ops/2015/09/20/change-travis-node-version.html
   - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`) && source ~/.nvm/nvm.sh && nvm install $TRAVIS_NODE_VERSION