More akka sub-project maintainence

Trying to solve:

    [error] Fatal: multiple projects produce the same artifacts. Please exclude them from some of the conflicting projects.

    [error]   com.typesafe.akka#akka-sample-main-scala, from:  akka, akka-bad
    [error]   com.typesafe.akka#akka-sample-main-java, from:  akka, akka-bad
    [error]   com.typesafe.akka#akka-sample-camel-scala, from:  akka, akka-bad
    [error]   com.typesafe.akka#akka-sample-camel-java, from:  akka, akka-bad
    [error]   com.typesafe.akka#akka-sample-remote-scala, from:  akka, akka-bad
    [error]   com.typesafe.akka#akka-sample-remote-java, from:  akka, akka-bad
    [error]   com.typesafe.akka#akka-sample-cluster-scala, from:  akka, akka-bad
    [error]   com.typesafe.akka#akka-sample-cluster-java, from:  akka, akka-bad
Merge pull request #5 from retronym/topic/akka-subs3

More akka sub-project maintainence