[release-v1.16] Trigger Image builds

[mgencur]

Trigger image builds by an empty commit and fix the periodic job that fails every hour: https://prow.ci.openshift.org/job-history/gs/test-platform-results/logs/periodic-image-mirroring-knative

[openshift-ci]

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This pull-request has been approved by: mgencur

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[mgencur]

Hmm. The dockefiles need to be updated similar to release-v1.15 branch.

[dsimansk]

Hmm. The dockefiles need to be updated similar to release-v1.15 branch.

@mgencur yep, sorry about that but release-1.16 branch isn't in exactly a production ready shape right now. It's a known issue...

[openshift-ci]

@mgencur: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/417-images	08ef6c1	link	true	/test 417-images
ci/prow/417-test-e2e-aws-417	08ef6c1	link	true	/test 417-test-e2e-aws-417
ci/prow/417-test-e2e	08ef6c1	link	true	/test 417-test-e2e

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