Fix PowerReportMissing for new VRs

[resmo]

Description

Fallback to update (and creating) time when power state update time is null.
Follow up of CLOUDSTACK-8848
(also see 542880a#diff-dd162c545fd70c5cf2c4b2fa599c13c9L114)

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

GitHub Issue/PRs

Fixes #2845

Screenshots (if appropriate):

N/A

How Has This Been Tested?

Needs testing

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
  Testing
• I have added tests to cover my changes.
• All relevant new and existing integration tests have passed.
• A full integration testsuite with all test that can run on my environment has passed.

[yadvr]

@blueorangutan package

[blueorangutan]

@rhtyd a Jenkins job has been kicked to build packages. I'll keep you posted as I make progress.

[blueorangutan]

Packaging result: ✔centos6 ✔centos7 ✔debian. JID-2298

[yadvr]

@blueorangutan test centos7 vmware-65

[blueorangutan]

@rhtyd a Trillian-Jenkins test job (centos7 mgmt + vmware-65) has been kicked to run smoke tests

[blueorangutan]

Trillian test result (tid-3012)
Environment: vmware-65 (x2), Advanced Networking with Mgmt server 7
Total time taken: 31172 seconds
Marvin logs: https://github.com/blueorangutan/acs-prs/releases/download/trillian/pr2846-t3012-vmware-65.zip
Intermittent failure detected: /marvin/tests/smoke/test_deploy_vgpu_enabled_vm.py
Intermittent failure detected: /marvin/tests/smoke/test_deploy_virtio_scsi_vm.py
Intermittent failure detected: /marvin/tests/smoke/test_outofbandmanagement.py
Intermittent failure detected: /marvin/tests/smoke/test_volumes.py
Intermittent failure detected: /marvin/tests/smoke/test_vpc_redundant.py
Smoke tests completed. 66 look OK, 1 have error(s)
Only failed tests results shown below:

Test	Result	Time (s)	Test File
ContextSuite context=TestDeployVirtioSCSIVM>:teardown	Error	0.00	test_deploy_virtio_scsi_vm.py

[borisstoyanov]

LGTM