Various scala-2.13.0-M5 fixes

fix akka-actor-tests compile errors

some tests still fail though

Fix test failures in akka-actor-test

Manually work arround missing implicit Factory[Nothing, Seq[Nothing]]

see https://github.com/scala/scala-collection-compat/issues/137

akka-remote scalafix changes

Fix shutdownAll compile error

test:akka-remote scalafix changes

akka-multi-node-testkit scalafix

Fix akka-remote-tests multi-jvm compile errors

akka-stream-tests/test:scalafix

Fix test:akka-stream-tests

Crude implementation of ByteString.map

scalafix akka-actor-typed, akka-actor-typed-tests

akka-actor-typed-tests compile and succeed

scalafix akka-camel

scalafix akka-cluster

akka-cluster compile & test

scalafix akka-cluster-metrics

Fix akka-cluster-metrics

scalafix akka-cluster-tools

akka-cluster-tools compile and test

scalafix akka-distributed-data

akka-distributed-data fixes

scalafix akka-persistence

scalafix akka-cluster-sharding

fix akka-cluster-sharding

scalafix akka-contrib

Fix akka-cluster-sharding-typed test

scalafix akka-docs

Use scala-stm 0.9 (released for M5)

akka-docs

Remove dependency on collections-compat

Cherry-pick the relevant constructs to our own
private utils

Shorten 'scala.collections.immutable' by importing it

Duplicate 'immutable' imports

Use 'foreach' on futures

Replace MapLike with regular Map

Internal API markers

Simplify ccompat by moving PackageShared into object

Since we don't currently need to differentiate between 2.11 and

Avoid relying on 'union' (and ++) being left-biased

Fix akka-actor/doc by removing -Ywarn-unused

Make more things more private

Copyright headers

Use 'unsorted' to go from SortedSet to Set

Duplicate import

Use onComplete rather than failed.foreach

Clarify why we partly duplicate scala-collection-compat

akka-distributed-data/src/main/scala/akka/cluster/ddata/Replicator.scala

@@ -53,6 +53,7 @@ import scala.collection.immutable.TreeSet
 import akka.cluster.MemberStatus
 import scala.annotation.varargs
 import akka.util.JavaDurationConverters._
+import akka.util.ccompat._
 
 object ReplicatorSettings {
 
@@ -1109,13 +1110,13 @@ final class Replicator(settings: ReplicatorSettings) extends Actor with ActorLog
     override def createDeltaPropagation(deltas: Map[KeyId, (ReplicatedData, Long, Long)]): DeltaPropagation = {
       // Important to include the pruning state in the deltas. For example if the delta is based
       // on an entry that has been pruned but that has not yet been performed on the target node.
-      DeltaPropagation(selfUniqueAddress, reply = false, deltas.collect {
+      DeltaPropagation(selfUniqueAddress, reply = false, deltas.iterator.collect {
         case (key, (d, fromSeqNr, toSeqNr)) if d != NoDeltaPlaceholder ⇒
           getData(key) match {
             case Some(envelope) ⇒ key → Delta(envelope.copy(data = d), fromSeqNr, toSeqNr)
             case None           ⇒ key → Delta(DataEnvelope(d), fromSeqNr, toSeqNr)
           }
-      }(collection.breakOut))
+      }.toMap)
     }
   }
   val deltaPropagationTask: Option[Cancellable] =
@@ -1461,9 +1462,9 @@ final class Replicator(settings: ReplicatorSettings) extends Actor with ActorLog
   }
 
   def receiveGetKeyIds(): Unit = {
-    val keys: Set[KeyId] = dataEntries.collect {
+    val keys: Set[KeyId] = dataEntries.iterator.collect {
       case (key, (DataEnvelope(data, _, _), _)) if data != DeletedData ⇒ key
-    }(collection.breakOut)
+    }.to(immutable.Set)
     replyTo ! GetKeyIdsResult(keys)
   }
 
@@ -1700,14 +1701,14 @@ final class Replicator(settings: ReplicatorSettings) extends Actor with ActorLog
     if (keys.nonEmpty) {
       if (log.isDebugEnabled)
         log.debug("Sending gossip to [{}], containing [{}]", replyTo.path.address, keys.mkString(", "))
-      val g = Gossip(keys.map(k ⇒ k → getData(k).get)(collection.breakOut), sendBack = otherDifferentKeys.nonEmpty)
+      val g = Gossip(keys.iterator.map(k ⇒ k → getData(k).get).toMap, sendBack = otherDifferentKeys.nonEmpty)
       replyTo ! g
     }
     val myMissingKeys = otherKeys diff myKeys
     if (myMissingKeys.nonEmpty) {
       if (log.isDebugEnabled)
         log.debug("Sending gossip status to [{}], requesting missing [{}]", replyTo.path.address, myMissingKeys.mkString(", "))
-      val status = Status(myMissingKeys.map(k ⇒ k → NotFoundDigest)(collection.breakOut), chunk, totChunks)
+      val status = Status(myMissingKeys.iterator.map(k ⇒ k → NotFoundDigest).toMap, chunk, totChunks)
       replyTo ! status
     }
   }
@@ -1846,9 +1847,9 @@ final class Replicator(settings: ReplicatorSettings) extends Actor with ActorLog
 
   def initRemovedNodePruning(): Unit = {
     // initiate pruning for removed nodes
-    val removedSet: Set[UniqueAddress] = removedNodes.collect {
+    val removedSet: Set[UniqueAddress] = removedNodes.iterator.collect {
       case (r, t) if ((allReachableClockTime - t) > maxPruningDisseminationNanos) ⇒ r
-    }(collection.breakOut)
+    }.to(immutable.Set)
 
     if (removedSet.nonEmpty) {
       for ((key, (envelope, _)) ← dataEntries; removed ← removedSet) {