[GH-51] baseline integration tests

[jeffbanks]

Baseline kubectl authorization verification.

[jsanda]

Can you create a Go module for the tests? e.g.,

go mod init github.com/k8ssandra/k8ssandra/tests

[jeffbanks]

Updates include:

• Synchronizing util operations during cleanup along with timeout of delete when resources are not found/exist.
• Cass-operator specific verification as baseline integration test.
• Consistent use of namespace passed to util functions along with error detection and enhanced logging.
• Module for test util for integration test support.

[jsanda]

Things are coming together nicely!

The one additional verification step I would like to see if checking that the CassandraDatacenter is ready.

[jsanda]

👍

[jeffbanks]

Closing as this has been replaced with PR#105 for continued efforts with most recent set of changes post kubecon on master. Feedback and observations in this PR are bein addressed in the new PR.

[jeffbanks]

This work replaced with iterations of #105