Alternate config for Akka using case classes

AkkaConfig.scala

package akka.config

case class AkkaConfig(
  version: String = "1.1-SNAPSHOT",
  enabledModules: List[String] = Nil,
  timeUnit: String = "seconds",
  enableJmx: Boolean = true,
  boot: List[String] = Nil,
  actor: ActorConfig = ActorConfig(),
  stm: StmConfig = StmConfig(),
  jta: JtaConfig = JtaConfig(),
  http: HttpConfig = HttpConfig(),
  remote: RemoteConfig = RemoteConfig())

case class ActorConfig(
  timeout: Int = 5,
  serializeMessages: Boolean = false,
  throughput: Int = 5,
  throughputDeadlineTime: Int = -1,
  dispatcherShutdownTimeout: Int = 1,
  defaultDispatcher: DefaultDispatcherConfig = DefaultDispatcherConfig())

case class DefaultDispatcherConfig(
  dispatcher: String = "GlobalExecuterBasedEventDriven",
  keepAliveTime: Int = 60,
  corePoolSizeFactor: Double = 1.0,
  maxPoolSizeFactor: Double = 4.0,
  executorBounds: Int = -1,
  allowCoreTimeout: Boolean = true,
  rejectionPolicy: String = "caller-runs",
  throughput: Int = 5,
  throughputDeadlineTime: Int = -1,
  aggregate: Boolean = false,
  mailboxCapacity: Int = -1,
  mailboxPushTimeout: Int = 10)

case class StmConfig(
  fair: Boolean = true,
  maxRetries: Int = 1000,
  timeout: Int = 5,
  writeSkew: Boolean = true,
  blockingAllowed: Boolean = false,
  interruptible: Boolean = false,

  speculative: Boolean = true,
  quickRelease: Boolean = true,
  propagation: String = "requires",
  traveLevel: String = "none",
  hooks: Boolean = true,
  jtaAware: Boolean = false)

case class JtaConfig(
  provider: String = "from-jndi",
  timeout: Int = 60)

case class HttpConfig()

case class RemoteConfig(
  layer: String = "akka.remote.netty.NettyRemoteSupport",
  server: ServerConfig = ServerConfig())

case class ServerConfig(
  hostname: String = "localhost",
  port: Int = 2552)