Remove blocking queue from RocksDBStore

      cacheManager.defineConfiguration("weather", new ConfigurationBuilder()
         .persistence()
            .addStore(RocksDBStoreConfigurationBuilder.class)
            .location("target/data")
            .expiredLocation("target/expired")
         .expiration().lifespan(5, TimeUnit.SECONDS)
         .build());
      cache = cacheManager.getCache("weather");

      int max = 10001;
      for (int i=0; i<max; i++) {
         cache.put(UUID.randomUUID().toString(), UUID.randomUUID().toString());
      }