Pin versions for all akka artifacts

[ParSal123]

Not all artifacts are pinned. For example akka-rolling-update-kubernetes (part of akka-management) or many artifacts from alpakka .

[ennru]

The Akka Management dependency is properly listed, AFAICS.

akka-dependencies/project/Dependencies.scala

Line 81 in f52e2e7

"com.lightbend.akka.management" %% "akka-rolling-update-kubernetes" % AkkaManagement,

For Alpakka we made the deliberate choice to only list the few supported modules. Alpakka modules generally don't depend on each other and different versions of different modules can normally work on the same classpath.