Stephen O'Donnell created HDDS-5766:
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             Summary: Speed up some OM test by skipping SCM safemode check
                 Key: HDDS-5766
                 URL: https://issues.apache.org/jira/browse/HDDS-5766
             Project: Apache Ozone
          Issue Type: Improvement
          Components: test
    Affects Versions: 1.2.0
            Reporter: Stephen O'Donnell
            Assignee: Stephen O'Donnell


Many of the OzoneManager integration tests do not really use SCM or the 
datanodes. Therefore we can skip the safemode check in SCM and start zero 
datanodes to make the mini-cluster come up faster.

With just this change, on my laptop:

```
TestOzoneManagerConfiguration went from 6min -> 3min 40s.
TestOzoneManagerHAMetadataOnly went from 4min 19s -> 1min 9s.
TestOzoneManagerListVolumes went from 40s -> 20s
TestOMMetrics went from 2min 6 -> 39s 55s
```

The runtime for these tests on Github is:

```
[INFO] Tests run: 9, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 273.591 
s - in org.apache.hadoop.ozone.om.TestOzoneManagerConfiguration

Warning:  Tests run: 10, Failures: 0, Errors: 0, Skipped: 2, Time elapsed: 
363.67 s - in org.apache.hadoop.ozone.om.TestOzoneManagerHAMetadataOnly


[INFO] Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 181.937 
s - in org.apache.hadoop.ozone.om.TestOmMetrics

[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 50.156 s 
- in org.apache.hadoop.ozone.om.TestOzoneManagerListVolumes
```



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