[NEW VERSION] HBase 2.5.6 #432

Which new version of Apache HBase should we support?

HBase 2.5.6

Additional information

Change log:

• https://downloads.apache.org/hbase/2.5.6/RELEASENOTES.md

Of interest re. performance/monitoring:

• HBASE-27956 | Major | Support wall clock profiling in ProfilerServlet
• HBASE-27888 | Minor | Record readBlock message in log when it takes too long time

Changes required

Are there any upstream changes that we need to support?
e.g. new features, changed features, deprecated features etc.

Implementation checklist

Please don't change anything in this list.
Not all of these steps are necessary for all versions.

• Update the Docker image
• Update documentation to include supported version(s)
• Update and test getting started guide with updated version(s)
• Update operator to support the new version (if needed)
• Update integration tests to test use the new versions (in addition or replacing old versions
• Update examples to use new versions