Update travis.yml

.travis.yml

@@ -48,6 +48,9 @@ php:
   - 5.4
   - 5.5
   - 5.6
+matrix:
+  allow_failures:
+    - php: 5.6
 
 script:
   - bin/developer system:uninstall
@@ -65,5 +68,4 @@ script:
 #sqlite db generation should occur once Phraseanet is up to date :
   - bin/developer phraseanet:regenerate-sqlite
   - ./node_modules/.bin/grunt test
-  - phpunit --version
-  - phpunit
+  - bin/phpunit