fix get_current_namespace

[carsonmh]

Issue link

closes #289

What changes have been made

Sometimes when the user has an api_client, they don't always want to search the serviceaccount. So this PR changes the get_current_namespace so that it always checks both the serviceaccount and kubeconfig for current namespace

Verification steps

Try logging out of cluster with oc logout and logging in through TokenAuthentication. Calling get_current_namespace should yield the correct result. With the old get_current_namespace it would print that namespace is not available

Checks

• [x] I've made sure the tests are passing.
• Testing Strategy
  • [x] Unit tests
  • [x] Manual tests
  • [ ] Testing is not required for this change

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