add Sonatype snapshots repo (to fix unresolved akka-ddd dep. error)
add Sonatype snapshots repo (to fix unresolved akka-ddd dep. error)

pawelkaczor/ddd-leaven-akka-v2,pawelkaczor/ddd-leaven-akka-v2,pawelkaczor/ddd-leaven-akka-v2