maxPoolSize is logged incorrectly in ByteBufferPool

In ByteBufferPool maxPoolSize is converted into byte format,

https://github.com/apache/hbase/blob/a521a80c4b9a8b0749c368d1ff66fea2ed2d77a2/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferPool.java#L85

Currently maxPoolSize is logged as below,

2020-04-10 14:20:56,000 INFO  [Time-limited test] io.ByteBufferPool(83): Created with bufferSize=64 KB and maxPoolSize=320 B