HDDS-10119. Assertions on object creationTime fail with Java 17

[adoroszlai]

What changes were proposed in this pull request?

Several client tests that compare volume/bucket creation time to Instant.now() as of the start of the test failed because now() may include a nanosecond component, while creation time is recorded with millisecond precision only.

ozone/hadoop-ozone/client/src/main/java/org/apache/hadoop/ozone/client/OzoneBucket.java

Line 171 in 02bfa7f

this.creationTime = Instant.ofEpochMilli(builder.creationTime);

This is fixed by using Instant.ofEpochMillis to record test start time, too.

https://issues.apache.org/jira/browse/HDDS-10119

How was this patch tested?

Tested locally with Java 17:

$ JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64 \
  ./hadoop-ozone/dev-support/checks/junit.sh -am -pl :ozone-integration-test -DexcludedGroups=unhealthy \
  -Dtest="TestOzoneAtRestEncryption,TestOzoneClient,TestOzoneRpcClient,TestOzoneRpcClientWithRatis,TestSecureOzoneRpcClient,TestStorageContainerManagerHA"
...
[INFO] Tests run: 7, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.681 s -- in org.apache.hadoop.ozone.client.TestOzoneClient
...
[INFO] Tests run: 3, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 120.4 s -- in org.apache.hadoop.ozone.scm.TestStorageContainerManagerHA
[INFO] Tests run: 123, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 30.78 s -- in org.apache.hadoop.ozone.client.rpc.TestSecureOzoneRpcClient
[INFO] Tests run: 121, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 50.17 s -- in org.apache.hadoop.ozone.client.rpc.TestOzoneRpcClient
[INFO] Tests run: 31, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 35.50 s -- in org.apache.hadoop.ozone.client.rpc.TestOzoneAtRestEncryption
[INFO] Tests run: 125, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 63.53 s -- in org.apache.hadoop.ozone.client.rpc.TestOzoneRpcClientWithRatis

Regular CI (with Java 8):
https://github.com/adoroszlai/ozone/actions/runs/7538133915

[sodonnel]

LGTM

[adoroszlai]

Thanks @sodonnel for the review.