Attempt to fix gitlab build

[breedx-splk]

After #2287 was merged, the snapshot builds in gitlab began failing due to

FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring project ':agent-csa-bundle'.
> Cannot change hierarchy of dependency configuration ':agent-csa-bundle:csaReleases' after it has been resolved.

Obviously a very clear and helpful error message. 🙄

Especially weird that the exact same gradle command passes both locally on my box but also in GitHub. Feh.

Anyway, I found some prior art that this kind of problem is caused by stuff being done at config time. Because it's complaining about the csReleases config, and the config is only mentioned in 3 places (the declaration of the config itself, once in the dependency block, and the zipTree() copy [as changed in this PR]), I figured it was worth a shot. It doesn't seem to break anything anyway.