JdbcClusteredPersistentEntitySpec: barrier failed: end 'send commands to target entity'

[raboof]

https://travis-ci.com/github/lagom/lagom/jobs/511251395

- must send commands to target entity *** FAILED *** (3 minutes, 22 seconds)
[JVM-3]   java.lang.RuntimeException: barrier failed: end 'send commands to target entity'
[JVM-3]   at akka.remote.testconductor.ClientFSM$$anonfun$3.applyOrElse(Player.scala:245)
[JVM-3]   at akka.remote.testconductor.ClientFSM$$anonfun$3.applyOrElse(Player.scala:219)
[JVM-3]   at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:35)
[JVM-3]   at akka.actor.FSM.processEvent(FSM.scala:851)
[JVM-3]   at akka.actor.FSM.processEvent$(FSM.scala:848)
[JVM-3]   at akka.remote.testconductor.ClientFSM.akka$actor$LoggingFSM$$super$processEvent(Player.scala:172)
[JVM-3]   at akka.actor.LoggingFSM.processEvent(FSM.scala:991)
[JVM-3]   at akka.actor.LoggingFSM.processEvent$(FSM.scala:973)
[JVM-3]   at akka.remote.testconductor.ClientFSM.processEvent(Player.scala:172)