@Override
    public void cacheBlock(BlockCacheKey cacheKey, Cacheable buf) {
      super.cacheBlock(cacheKey, buf);
    }
Basic test of BucketCache.Puts and gets.
<p>
Tests will ensure that blocks' data correctness under several threads concurrency
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCache.java