Subresource cache fix psr-6 compliance

Author: abluchet

src/Operation/Factory/CachedSubresourceOperationFactory.php

@@ -37,7 +37,7 @@ public function __construct(CacheItemPoolInterface $cacheItemPool, SubresourceOp
      */
     public function create(string $resourceClass): array
     {
-        $cacheKey = self::CACHE_KEY_PREFIX.str_replace('\\', '', $resourceClass);
+        $cacheKey = self::CACHE_KEY_PREFIX.md5($resourceClass);
 
         try {
             $cacheItem = $this->cacheItemPool->getItem($cacheKey);

tests/Operation/Factory/CachedSubresourceOperationFactoryTest.php

@@ -81,6 +81,6 @@ public function testCreateWithGetCacheItemThrowsCacheException()
 
     private function generateCacheKey(string $resourceClass = Dummy::class)
     {
-        return CachedSubresourceOperationFactory::CACHE_KEY_PREFIX.str_replace('\\', '', $resourceClass);
+        return CachedSubresourceOperationFactory::CACHE_KEY_PREFIX.md5($resourceClass);
     }
 }