Use phpunit from composer download

.travis.yml

@@ -7,12 +7,11 @@ php:
   - 5.5
   - 5.4
   - 5.3
-script: phpunit --coverage-clover=coverage.clover
+script: ../vendor/bin/phpunit --coverage-clover=coverage.clover
 before_script:
   - composer require phpunit/dbunit
   - mysql -e 'create database alternc_test DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;'
   - cd phpunit
-  - which phpunit
 after_script:
   - wget https://scrutinizer-ci.com/ocular.phar
   - php ocular.phar code-coverage:upload --format=php-clover coverage.clover