HDDS-10081. Copy and migrate Hadoop base test classes to JUnit5

[adoroszlai]

What changes were proposed in this pull request?

Ozone relies on base test classes from Hadoop for:

• TestOzoneConfigurationFields
• filesystem contract tests

Currently those base classes are implemented using JUnit4 (migration is in progress in Hadoop repo).

This PR:

• copies the base classes from Hadoop 3.3.6
• migrates them to JUnit5 as much as possible (incorporating in-progress changes from Hadoop) without touching the concrete implementation subclasses in Ozone

TestConfigurationFieldsBase is completely migrated.

Abstract contract tests:

• assertions migrated to AssertJ (HADOOP-19025)
• extends Assert removed from AbstractFSContractTestBase and ContractTestUtils
• JUnit5 lifecycle annotations added (but JUnit4-ones also kept)
• @Test annotations left unchanged (still using JUnit4)
• slightly tweaked for checkstyle/findbugs (but still need some suppression), since rules in Hadoop seem more lenient

Most Ozone contract tests use Parameterized runner, which requires quite some refactoring for migrating to JUnit5. HDDS-10074 will finish that by refactoring Ozone's contract tests to JUnit5, and simply replacing @Test annotations in the abstract contract test base classes.

https://issues.apache.org/jira/browse/HDDS-10081

How was this patch tested?

Existing integration (contract) check in CI:

Tests run: 357, Failures: 0, Errors: 0, Skipped: 6

[SaketaChalamchala]

@hemantk-12 can you please take a look?

[SaketaChalamchala]

@swamirishi could you please take a look as well?

[adoroszlai]

This might seem to be a large change, but most of the code is copied from Hadoop. Since this code is intended to be temporary in Ozone, I don't think we need to inspect it in detail, or adapt to Ozone coding conventions (beyond what checkstyle/findbugs complains about).

Having the same number of tests before/after the change, and with all tests passing, I think it should be fine.

If it helps during review, the follow-up change (conversion of Ozone contract tests to JUnit5) can be peeked at: adoroszlai@708f49b.

[hemantk-12]

Thanks @adoroszlai for the patch.

Approving it without paying much attention to details as it is copied.

[adoroszlai]

Thanks @hemantk-12 for the review. I pushed a new commit that replaces an import, because it is no longer accepted in Ozone after HDDS-10099:

-import org.apache.hadoop.thirdparty.com.google.common.base.Charsets;
+import com.google.common.base.Charsets;

[smengcl]

lgtm at a glance. Thanks @adoroszlai

[adoroszlai]

Thanks @hemantk-12, @smengcl for the review.