+tes #15132 Add additional overloaded expectMsg to TestKit
+per #15229 defer for PersistentActor

* Deferred events are not persisted, thus will not participate in replays
  etc. If users want events to be persisted, they can simply use
  `persistAsync` instead.
* This, 3rd, rewrite extends the Persistent hierarchy by a top level
  trait "Resequenceable", which is used to mark every event to be sent
  in sequence back to the PersistentActor. These are split into
  NonPersistentRepr or PersistentRepr, and acted upon accordingly.
* defer is guaranteed to be called, even after persistence failures
* Includes docs updates for java/scala/java8

Resolves #15229
Depends on #15227

Conflicts:
	akka-docs/rst/scala/code/docs/persistence/PersistenceDocSpec.scala
	akka-persistence/src/main/scala/akka/persistence/JournalProtocol.scala
	akka-persistence/src/main/scala/akka/persistence/Processor.scala
	akka-persistence/src/test/scala/akka/persistence/PersistentActorSpec.scala
	project/AkkaBuild.scala
Merge pull request #15381 from ktoso/port-defer

!per PersistentActor#defer (forward port)
=act #15395 update typesafe config API URL
Merge pull request #15370 from mkubala/expectMsg-with-hint-mkubala

+tes #15132 Add additional overloaded expectMsg to TestKit
=tes #15132 remove not needed lazy val
=act,clu,con,doc,per,rem,sam #15114 append missing parens at Actor.sender() invocations
+act #13992 Improve identify replies of wildcard selections

(cherry picked from commit 4747b18d66fafb5699168288b09b7f39da5c2e4e)

Conflicts:
	akka-actor/src/main/scala/akka/actor/ActorSelection.scala
	project/AkkaBuild.scala
Merge pull request #15421 from akka/wip-13992-identify-wildcards-master-patriknw

+act #13992 Improve identify replies of wildcard selections (for validation)
Merge pull request #15416 from mkubala/missing-sender-parens-mkubala

=act,clu,con,doc,per,rem,sam #15114 append missing parens at sender invocations
+act #15383 add strict japi.Option.getOrElse to simplify working with options from Java
!per #15230 rename processorId => persistentId

* This is NOT binary compatible, we're in an *experimental* module.
* disabled binary compat checks for package akka.persistence
* Source compatibility is retained, but users should migrate do the new
  method name ASAP.
* Plugin APIs were migrated in a way that allows the old plugins to
  compile agains 2.3.4 without having to change anything. Hopefuly this
  will help authors migrate to 2.3.4 sooner. This is only source level compatible, not binary compatible.
* added deprecation warnings on all processorId methods and provided bridges where possible
* for users, the migration should be painless, they can still override
  the old method, and it'll work. But we encourage them to move to
  persistenceId; All delegation code will have to be removed afterwards ofc.

Conflicts:
	akka-persistence/src/main/scala/akka/persistence/Channel.scala
	akka-persistence/src/main/scala/akka/persistence/JournalProtocol.scala
	akka-persistence/src/main/scala/akka/persistence/Persistent.scala
	akka-persistence/src/main/scala/akka/persistence/PersistentChannel.scala
	akka-persistence/src/main/scala/akka/persistence/Processor.scala
	akka-persistence/src/main/scala/akka/persistence/Snapshot.scala
	akka-persistence/src/main/scala/akka/persistence/journal/AsyncWriteProxy.scala
	akka-persistence/src/main/scala/akka/persistence/journal/inmem/InmemJournal.scala
	akka-persistence/src/main/scala/akka/persistence/journal/leveldb/LeveldbKey.scala
	akka-persistence/src/main/scala/akka/persistence/snapshot/SnapshotStore.scala
	akka-persistence/src/test/scala/akka/persistence/serialization/SerializerSpec.scala
	project/AkkaBuild.scala
Merge pull request #15434 from ktoso/port-persistenceId-ktoso

!per #15230 rename processorId => persistentId (for validation)
=per #15230 deprecate Channel and PersistentChannel

Conflicts:
	akka-persistence/src/main/scala/akka/persistence/Channel.scala
	akka-persistence/src/main/scala/akka/persistence/PersistentChannel.scala
	akka-persistence/src/test/scala/akka/persistence/serialization/SerializerSpec.scala
Merge pull request #15435 from ktoso/port-deprecations-channel-ktoso

!per #15230 deprecate Channel and PersistentChannel (for Validation)
Merge pull request #15430 from spray/w/add-japi-Option-getOrElse

+act #15383 add strict japi.Option.getOrElse to simplify working with options from Java
+per,+str #15035 Reactive-stream producers for persistent messages written by akka-persistence processors

(cherry picked from commit 5dc62400e4f2f9d7afe5efe93fc8bef5b9d226c0)

Conflicts:
	akka-docs/rst/scala/code/docs/persistence/PersistenceDocSpec.scala
	project/AkkaBuild.scala
=per #15429 Rewrite persistence documentation and samples for 2.3.4 changes

(cherry picked from commit 02351e32f110a8c4a249f0f3f84bae5898d1a836)

Conflicts:
	akka-samples/akka-sample-persistence-java-lambda/tutorial/index.html
	akka-samples/akka-sample-persistence-java/tutorial/index.html
	akka-samples/akka-sample-persistence-scala/build.sbt
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ConversationRecoveryExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/PersistentActorExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ProcessorChannelExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/ProcessorChannelRemoteExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/SnapshotExample.scala
	akka-samples/akka-sample-persistence-scala/src/main/scala/sample/persistence/StreamExample.scala
	akka-samples/akka-sample-persistence-scala/tutorial/index.html
Merge pull request #15444 from akka/wip-15429-persistence-docs-master-patriknw

=per #15429 Rewrite persistence documentation and samples (for validation)