Enable Redis async import

- using javibravo/simpleue
- internal config value are now `import_with_redis` & `import_with_rabbit` which are more clear
- if both option are enable rabbit will be choosen
- services imports related to async are now splitted into 2 files: `redis.yml` & `rabbit.yml`
-

composer.json

@@ -82,7 +82,9 @@
         "ocramius/proxy-manager": "1.*",
         "white-october/pagerfanta-bundle": "^1.0",
         "mouf/nodejs-installer": "~1.0",
-        "php-amqplib/rabbitmq-bundle": "^1.8"
+        "php-amqplib/rabbitmq-bundle": "^1.8",
+        "predis/predis": "^1.0",
+        "javibravo/simpleue": "^1.0"
     },
     "require-dev": {
         "doctrine/doctrine-fixtures-bundle": "~2.2",
@@ -90,7 +92,8 @@
         "sensio/generator-bundle": "^3.0",
         "phpunit/phpunit": "~5.0",
         "symfony/phpunit-bridge": "^3.0",
-        "friendsofphp/php-cs-fixer": "~1.9"
+        "friendsofphp/php-cs-fixer": "~1.9",
+        "m6web/redis-mock": "^2.0"
     },
     "scripts": {
         "post-cmd": [