Merge branch '1.3'

* 1.3:
  Update travis configuration to use container based infrastructure, also use cache for composer in order to reduce network usage
  Use Stateful object to check if Interactive Login have been triggered

.travis.yml

 language: php
 
+sudo: false
+
+cache:
+    directories:
+      - $HOME/.composer/cache
+
 before_script:
     # symfony/*
     - sh -c "if [ '$SYMFONY_DEPS_VERSION' = '2.8' ]; then sed -i 's/~2.6/2.8.*@dev/g' composer.json; composer update --dev --prefer-source; fi"
@@ -8,17 +14,12 @@ before_script:
 
 script: phpunit
 
-php:
-  - 5.5
-  - 5.6
-  - 7.0
-  - hhvm
-
 matrix:
-    allow_failures:
-        - php: hhvm
     include:
+        - php: 5.5
         - php: 5.6
           env: SYMFONY_DEPS_VERSION=2.7
         - php: 5.6
           env: SYMFONY_DEPS_VERSION=2.8
+        - php: 7.0
+        - php: hhvm