[index] Initialize cache before loading to bridge

Previously BridgeAbstract needed to know which exact implementation
of CacheInterface was used (since we only got one right now its
not a problem). Initializing the cache in index.php instead allows
to change cache types more easily.

lib/BridgeAbstract.php

@@ -138,7 +138,6 @@ abstract class BridgeAbstract implements BridgeInterface {
 	*/
 	public function setDatas(array $inputs){
 		if(!is_null($this->cache)){
-			$this->cache->setParameters($inputs);
 			$time = $this->cache->getTime();
 			if($time !== false
 			&& (time() - static::CACHE_TIMEOUT < $time)