Mention compression algorithm along with other storefile details

Where we log storefile details we should also log the compression algorithm used to compress blocks on disk, if any.

For example, here's a log line out of compaction:

2018-10-02 21:59:47,594 DEBUG [regionserver/host/1.1.1.1:8120-longCompactions-1538517461152] compactions.Compactor: Compacting hdfs://namenode:8020/hbase/data/default/TestTable/86037c19117a46b5b8148439ea55753b/i/3d04a7c28d6343ceb773737dbb192533, keycount=3335873, bloomtype=ROW, size=107.5 M, encoding=ROW_INDEX_V1, seqNum=154199, earliestPutTs=1538516084915

Aside from bloom type, block encoding, and filename, it would be good to know compression type in this type of DEBUG or INFO level logging. A minor omission of information that could be helpful during debugging.