Check for dashboard readiness after cluster is ready

[ChristianZaccaria]

Issue link

Resolves #355

What changes have been made

The check for is_dashboard_ready is now performed after the cluster is ready.

Verification steps

1. Run cluster.up() and cluster.wait_ready() together.
2. See no errors.

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests

[Maxusmusti]

Looks good, just one request that I know may be worth adding for the future

[Maxusmusti]

Also, looks like pre-commit test failed, may need to run. black on changed files (or let the pre-commit module make the change locally)

[Maxusmusti]

LGTM

[openshift-ci]

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