chore: support for hbase 2.6.1

[dervoeti]

Description

Part of stackabletech/docker-images#972

I had to add the --no-checksum-verify flag when exporting snapshots to/from S3, because our snapshot-export test was failing for HBase 2.6.1.
From what I see, checksum verification was merged and released with 2.6.1: https://issues.apache.org/jira/browse/HBASE-28625
However, it seems to have problems when comparing snapshots on different filesystems (like HDFS and S3).

https://issues.apache.org/jira/browse/HBASE-28702 was also merged into 2.6.1 and seems to introduce a flag to skip checksum-checks between snapshots when exporting tables. I'm not sure if this flag is supposed to work with snapshot exports as well, at least I could not make it work. Setting fs.checksum.combine.mode to COMPOSITE_CRC also does not seem to work.

https://issues.apache.org/jira/browse/HBASE-28998 (still open) also mentions that it does not work with COMPOSITE_CRC and it specificly mentions problems with HDFS in combination with S3.

So I decided to add the --no-checksum-verify flag in our tests when exporting snapshots. From what I understand snapshot checksums where not validated before 2.6.1 either. I don't have too much experience with HBase and thus am not sure if this is really the best solution. Could one of our HBase experts (@razvan @siegfriedweber @lfrancke ?) take a look at this as well? If this solution is fine I would adapt the documentation accordingly.

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1. Changes are OpenShift compatible
2. CRD changes approved
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5. Integration tests passed (for non trivial changes)
6. Changes need to be "offline" compatible

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[razvan]

Indeed, it seems there is no workaround to the checksum problem currently.

The tests are green:

--- PASS: kuttl (4600.24s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/resources_hbase-latest-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (210.98s)
        --- PASS: kuttl/harness/shutdown_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (503.10s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-3.4.0_zookeeper-3.9.2_listener-class-external-unstable_openshift-false (420.45s)
        --- PASS: kuttl/harness/smoke_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-3.4.0_zookeeper-3.9.2_listener-class-cluster-internal_openshift-false (299.91s)
        --- PASS: kuttl/harness/cluster-operation_hbase-latest-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (259.18s)
        --- PASS: kuttl/harness/omid_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false_omid-1.1.2 (262.05s)
        --- PASS: kuttl/harness/logging_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (229.79s)
        --- PASS: kuttl/harness/overrides_hbase-latest-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (213.66s)
        --- PASS: kuttl/harness/kerberos_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_krb5-1.21.1_listener-class-cluster-internal_kerberos-realm-PROD.MYCORP_kerberos-backend-mit_openshift-false (448.90s)
        --- PASS: kuttl/harness/orphaned_resources_hbase-latest-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (240.87s)
        --- PASS: kuttl/harness/kerberos_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_krb5-1.21.1_listener-class-external-unstable_kerberos-realm-PROD.MYCORP_kerberos-backend-mit_openshift-false (481.88s)
        --- PASS: kuttl/harness/profiling_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (226.43s)
        --- PASS: kuttl/harness/snapshot-export_hbase-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_openshift-false (288.24s)
        --- PASS: kuttl/harness/opa_hbase-opa-2.6.1,docker.stackable.tech_stackable_hbase_2.6.1-stackable0.0.0-dev_hdfs-latest-3.4.0_zookeeper-latest-3.9.2_krb5-1.21.1_opa-1.0.0_openshift-false (514.78s)
PASS

[razvan]

lgtm with a small fix