Some NetApp driver unit tests are slow

[Goutham Pacha Ravi]

From a recent run:

py3 run-test: commands[1] | stestr slowest
Test id Runtime (s)
--------------------------------------------------------------------------------------------------------------------------------------------------------- -----------
manila.tests.share.drivers.netapp.dataontap.client.test_client_cmode_rest.NetAppRestCmodeClientTestCase.test__wait_job_result_failure 58.100
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_data_motion.NetAppCDOTDataMotionSessionTestCase.test_wait_for_snapmirror_release_vol_1 10.069
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_data_motion.NetAppCDOTDataMotionSessionTestCase.test_wait_for_snapmirror_release_svm_2 10.060
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_lib_base.NetAppFileStorageLibraryTestCase.test_migration_cancel_2 10.060
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_data_motion.NetAppCDOTDataMotionSessionTestCase.test_convert_svm_to_default_subtype_2_False 10.054
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_lib_multi_svm.NetAppFileStorageLibraryTestCase.test__wait_for_operation_status_error 10.051
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_data_motion.NetAppCDOTDataMotionSessionTestCase.test_convert_svm_to_default_subtype_1_True 10.049
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_data_motion.NetAppCDOTDataMotionSessionTestCase.test_wait_for_snapmirror_release_vol_2 10.047
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_lib_multi_svm.NetAppFileStorageLibraryTestCase.test__wait_for_operation_status 10.047
manila.tests.share.drivers.netapp.dataontap.cluster_mode.test_data_motion.NetAppCDOTDataMotionSessionTestCase.test_wait_for_vserver_state 10.047
_____________________________________________________________________ summary ______________________________________________________________________
  py3: commands succeeded
  congratulations :)

Top 40 slowest tests as of Aug 11 2023: https://paste.openstack.org/show/bps2RscQOkH5CmjUapUG/
It's possible that these tests aren't mocking "sleep"

[Vida Haririan (vhariria)]

See additional related discussions at https://meetings.opendev.org/meetings/manila/2023/manila.2023-08-17-15.00.log.html