Fix PHP 7.1 tests

Author: joelwurtz

Diff for: .travis.yml

@@ -30,7 +30,7 @@ matrix:
           env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci"
 
 before_install:
-    - if [[ $COVERAGE != true && $TRAVIS_PHP_VERSION != hhvm ]]; then phpenv config-rm xdebug.ini; fi
+    - if [[ $COVERAGE != true ]]; then phpenv config-rm xdebug.ini || true; fi
 
 install:
     # To be removed when this issue will be resolved: https://github.com/composer/composer/issues/5355