Fix circleci flow

[wind57]

[wind57]

When ActuatorRefreshKafkaIT started failing in github workflow, I could not understand why does it passes in circleci? It meant two things:

• circleci was caching SNAPSHOT dependencies, and we were never properly using snapshots. This was indeed the case, and while looking more closely and debugging a bit, I found out that the cache we were using was never being updated with latest snapshots. I fixed that in this PR.
• and second, it meant that ActuatorRefreshKafkaIT was broken because of a recent snapshot version of some library: the test was passing in circleci (where we had an older snapshot version and we were never using the newest one), and was failing in github workflow - where we were using the most recent snapshot version.

This PR also cleans up a bit the pipeline making it more readable. In essence, the flow/logic stays the same; but it's more readable now, imho.

And of course now, because we fixed this issue, ActuatorRefreshKafkaIT fails - which is normal and expected. When we figure out what is going on and fix the underlying problem, a rebuild here will pass the test.

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This PR can go in, only after the github actions one does.

[wind57]

@ryanjbaxter this is the next one in the list for you to review when you get a chance. thank you