HDDS-7066. Include number of tests requested in Freon output

[neils-dev]

What changes were proposed in this pull request?

To improve description of error when verify freon tests, ockv, are executed with default number-of-objects expected greater than the number of objects generated.

Currently, the default number-of-tests parameter is set to 1000. Under the condition that a freon test generates a number of objects less than the default and is followed by a verification freon test that verifys the objects without specifying the number-of-tests, it fails with an error that is not descriptive of the cause. This patch fixes this error by adding 2 items to the console output of freon tests that make the error more obvious to the user:

1.) On start of freon command execution, in addition to outputting to the console the --prefix parameter used, to also output the --number-of-tests parameter used (default or user specified).
2.) Should the command fail, as part of the print summary output to the console, to add the number-of-tests objects expected and the number succeeded.

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-7066

How was this patch tested?

Manually tested ockv command without --number-of-tests set when number of objects generated < default (1000 objects).

generate freon test, generate 10 keys with ockg
ozone freon ockg --volume=vol1 --bucket=freon --threads=12 --replication-type=RATIS --factor=THREE --size=134217728 --number-of-tests=10 --prefix=52128MYTEST
Total execution time (sec): 35
Failures: 0
Successful executions: 10

followed by a verify, validate freon test, validate keys without specifying --number-of-tests, using default of 1000 with ockv:

ozone freon ockv --volume=vol1 --bucket=freon --threads=9 --prefix=52128MYTEST
2022-07-28 17:00:10,322 [main] INFO impl.MetricsConfig: Loaded properties from hadoop-metrics2.properties
2022-07-28 17:00:10,393 [main] INFO impl.MetricsSystemImpl: Scheduled Metric snapshot period at 10 second(s).
2022-07-28 17:00:10,393 [main] INFO impl.MetricsSystemImpl: ozone-freon metrics system started
2022-07-28 17:00:10,493 [main] INFO freon.BaseFreonGenerator: Executing test with prefix 52128MYTEST and number-of-tests 1000
...
| 0/1000 Time: 0:00:062022-07-28 17:41:23,620 [pool-2-thread-8] ERROR freon.BaseFreonGenerator: Error on executing task 10
KEY_NOT_FOUND org.apache.hadoop.ozone.om.exceptions.OMException: Key:52128MYTEST/10 not found
at org.apache.hadoop.ozone.om.protocolPB.OzoneManagerProtocolClientSideTranslatorPB.handleError(OzoneManagerProtocolClientSideTranslatorPB.java:696)
...
99.9% <= 5260.18 milliseconds

Total execution time (sec): 9
Failures: 2
Successful executions: 10
Expected 1000 --number-of-tests objects!, successfully executed 10

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