Finally fixing RuntimeEventListenerSpec

[sebastian-peter]

... which still randomly fails:

A runtime event listener
- must add a valid runtime event to the blocking queue for further processing (5 milliseconds)
- must return valid log messages for each status event *** FAILED *** (126 milliseconds)
  java.lang.AssertionError: Received 1 excess messages on LoggingTestKitImpl(1,Some(INFO),Some(edu.ie3.simona.event.listener.RuntimeEventListener$),None,Some(Initializing Agents and Services for Simulation ... ),None,None,Map(),true,None).
  at org.apache.pekko.actor.testkit.typed.internal.LoggingTestKitImpl.expect(LoggingTestKitImpl.scala:115)
  at edu.ie3.simona.event.listener.RuntimeEventListenerSpec.$anonfun$new$5(RuntimeEventListenerSpec.scala:162)
  at edu.ie3.simona.event.listener.RuntimeEventListenerSpec.$anonfun$new$5$adapted(RuntimeEventListenerSpec.scala:158)
  at scala.collection.immutable.List.foreach(List.scala:334)
  at edu.ie3.simona.event.listener.RuntimeEventListenerSpec.$anonfun$new$4(RuntimeEventListenerSpec.scala:158)
  at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.scala:18)
  at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
  at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
  at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
  at org.scalatest.Transformer.apply(Transformer.scala:22)
  ...