This commit also decouples the "import" and "update" functions inside
ContentProxy. If a content array is available, it must be passed to the
new importEntry method.
- 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`
-