[release-v1.7] Use v1beta1 for Knative operator crd in tests

[openshift-cherrypick-robot]

This is an automated cherry-pick of #9

/assign creydr

[creydr]

/retitle [release-v1.7] Use v1beta1 for Knative operator crd in tests

[creydr]

@skonto @matzew #9 didn't get ported to 1.7 and 1.8 and I guess this relates to the issues in https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift-knative_eventing/58/pull-ci-openshift-knative-eventing-release-v1.7-411-test-e2e-aws-ocp-411/1606224317845082112:

...
        	Error:      	Expected nil, but got: &errors.StatusError{ErrStatus:v1.Status{TypeMeta:v1.TypeMeta{Kind:"", APIVersion:""}, ListMeta:v1.ListMeta{SelfLink:"", ResourceVersion:"", Continue:"", RemainingItemCount:(*int64)(nil)}, Status:"Failure", Message:"the server could not find the requested resource", Reason:"NotFound", Details:(*v1.StatusDetails)(0xc00058ca80), Code:404}}

[creydr]

/cherry-pick release-v1.8

[openshift-cherrypick-robot]

@creydr: once the present PR merges, I will cherry-pick it on top of release-v1.8 in a new PR and assign it to you.

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In response to this:

/cherry-pick release-v1.8

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[matzew]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[openshift-cherrypick-robot]

@creydr: new pull request created: #61

Details

In response to this:

/cherry-pick release-v1.8

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.