Disable xdebug when not generating coverage

.travis.yml

@@ -17,6 +17,7 @@ env:
 
 before_script:
   - if [[ $TRAVIS_PHP_VERSION = '7.1' && $DB = 'sqlite' ]]; then PHPUNIT_FLAGS="--coverage-clover .clover.xml"; else PHPUNIT_FLAGS=""; fi
+  - if [[ "$PHPUNIT_FLAGS" == "" ]]; then phpenv config-rm xdebug.ini || true; fi
 
 matrix:
   fast_finish: true
@@ -117,7 +118,7 @@ matrix:
 
 after_script:
  - if [[ "$PHPUNIT_FLAGS" != "" ]]; then wget https://scrutinizer-ci.com/ocular.phar; fi
- - if [[ "$PHPUNIT_FLAGS" != "" ]]; then php ocular.phar code-coverage:upload --format=php-clover ./clover.xml; fi
+ - if [[ "$PHPUNIT_FLAGS" != "" ]]; then php ocular.phar code-coverage:upload --format=php-clover .clover.xml; fi
 
 install:
   - travis_retry composer install