Kuttl test to cover an edge deployment scenario

[fmount]

This patch introduces a kuttl test that is supposed to cover an Edge use case deployment. It asserts that the required resources exist and the Pods are available. This change also updates the Edge sample to make sure it reflects the right type.

[openshift-ci]

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This pull-request has been approved by: fmount

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[fmount]

The failure is expected until #494 lands.

  [FAILED] Unexpected error:
      <*errors.StatusError | 0xc0007306e0>:
      admission webhook "vglance.kb.io" denied the request: Invalid backend configuration detected
      {
          ErrStatus: {
              TypeMeta: {Kind: "Status", APIVersion: "v1"},
              ListMeta: {
                  SelfLink: "",
                  ResourceVersion: "",
                  Continue: "",
                  RemainingItemCount: nil,
              },
              Status: "Failure",
              Message: "admission webhook \"vglance.kb.io\" denied the request: Invalid backend configuration detected",
              Reason: "Forbidden",
              Details: nil,
              Code: 403,
          },
      }

[fmount]

For the same reason, kuttl is failing and it should pass after rebasing on top of #494

=== CONT  kuttl/harness/glance_edge
    logger.go:42: 15:07:49 | glance_edge | Skipping creation of user-supplied namespace: glance-kuttl-tests
    logger.go:42: 15:07:49 | glance_edge/1-deploy_glance | starting test step 1-deploy_glance
    logger.go:42: 15:07:49 | glance_edge/1-deploy_glance | running command: [sh -c oc kustomize ../../../../config/samples/layout/edge | oc apply -n $NAMESPACE -f -
        ]
    logger.go:42: 15:07:51 | glance_edge/1-deploy_glance | Error from server (Forbidden): error when creating "STDIN": admission webhook "vglance.kb.io" denied the request: Invalid backend configuration detected
    case.go:364: failed in step 1-deploy_glance
    case.go:366: exit status 1

[fmount]

I have to review the samples config because this is not going to work w/o a ceph Pod deployed by in the kuttl context

[fmount]

/retest

[openshift-ci]

@fmount: 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/glance-operator-build-deploy-kuttl	c54d3e7	link	true	/test glance-operator-build-deploy-kuttl
ci/prow/glance-operator-build-kuttl	c54d3e7	link	true	/test glance-operator-build-kuttl
ci/prow/glance-operator-build-deploy-tempest	c54d3e7	link	true	/test glance-operator-build-deploy-tempest

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