HDDS-9997. Add static import for assertions and mocks in misc. integration tests

[raju-balpande]

What changes were proposed in this pull request?

Add static import for assertions and mocks in hadoop-hdds (only after all other subtasks for specific hadoop-hdds submodules are done).

• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/fs/ozone/TestOzoneFSInputStream.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/fs/ozone/TestOzoneFileSystemPrefixParser.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/fs/ozone/TestOzoneFileSystemWithStreaming.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/fs/ozone/TestOzoneFsSnapshot.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/hdds/upgrade/TestScmHAFinalization.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/OzoneTestUtils.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestBlockTokensCLI.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestContainerOperations.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestContainerStateMachineIdempotency.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestMiniOzoneOMHACluster.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/TestMultipartObjectGet.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/debug/TestLDBCli.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/freon/TestDataValidate.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/freon/TestFreonWithDatanodeFastRestart.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/freon/TestFreonWithPipelineDestroy.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/freon/TestHadoopDirTreeGenerator.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/freon/TestHadoopNestedDirGenerator.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/freon/TestOMSnapshotDAG.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/freon/TestOmBucketReadWriteKeyOps.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/parser/TestOzoneHARatisLogParser.java
• hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/recon/TestReconInsightsForDeletedDirectories.java

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-9997

How was this patch tested?

Tested the changes in ci-cd pipeline.
Also converted some assertTrue to assertThat at some places

[adoroszlai]

Thanks @raju-balpande for the patch and also improving some assertions.