Fix race condition in e2e test 1-052_validate_rolebinding_number

[jopit]

What type of PR is this?

/kind failing-test

What does this PR do / why we need it:

Fixes race condition in e2e test 1-052_validate_rolebinding_number. As per Jonathan's request:

• '02-check_rolebindings.yaml' should loop wait, rather than only running once then failing:
  • first it should loop, waiting for the expected number of rolebindings exist (e.g. similar to an 'Eventually' in ginkgo)
  • then it should loop, waiting that the expected number of rolebindings continue to exists for 20 seconds (similar to 'Consistently' in ginkgo)

[openshift-ci]

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[jopit]

/retest

[jopit]

/retest

[jgwest]

Cluster init failure

/retest

[jgwest]

LGTM, thanks @jopit!