HDDS-6750. Migrate simple tests in hdds-server-scm to JUnit5

[kaijchen]

What changes were proposed in this pull request?

Migrate simple tests in hdds-server-scm to JUnit5, in which "simple" means without @Rule and @RunWith.

Steps of the migration, each corresponding to one commit:

1. Run the following sed command against each file to substitute the class names.
2. Fix errors mannually (c787267).
3. Fix checkstyle (LineLength).

sed -i $1 \
	-e 's/org.junit.After;/org.junit.jupiter.api.AfterEach;/' \
	-e 's/@After$/@AfterEach/' \
	-e 's/org.junit.AfterClass;/org.junit.jupiter.api.AfterAll;/' \
	-e 's/@AfterClass$/@AfterAll/' \
	-e 's/org.junit.Before;/org.junit.jupiter.api.BeforeEach;/' \
	-e 's/@Before$/@BeforeEach/' \
	-e 's/org.junit.BeforeClass;/org.junit.jupiter.api.BeforeAll;/' \
	-e 's/@BeforeClass$/@BeforeAll/' \
	-e 's/org.junit.Test/org.junit.jupiter.api.Test/' \
	-e 's/org.junit.Assert/org.junit.jupiter.api.Assertions/' \
	-e 's/junit.framework.TestCase/org.junit.jupiter.api.Assertions/' \
	-e 's/Assert\./Assertions./'

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-6750

How was this patch tested?

Full CI: https://github.com/kaijchen/ozone/actions/runs/2326780703

[adoroszlai]

Thanks @kaijchen for working on this. LGTM, but noticed two empty @After methods that can be removed.

[kaijchen]

Thanks for reviewing @adoroszlai.

[adoroszlai]

Thanks @kaijchen for updating the patch.