+per #3906 use AbstractActor for Java8 Persistence

- also rename and link doc chapter

akka-docs/rst/java/index-actors.rst

@@ -15,3 +15,4 @@ Actors
    testing
    lambda-actors
    lambda-fsm
+   lambda-persistence

akka-docs/rst/java/lambda-persistence.rst

@@ -1,8 +1,8 @@
 .. _persistence-lambda-java:
 
-##########################################
-Persistence with Java 8 Lambda Expressions
-##########################################
+######################################
+Persistence (Java with Lambda Support)
+######################################
 
 
 Akka persistence enables stateful actors to persist their internal state so that it can be recovered when an actor

akka-persistence/src/main/scala/akka/persistence/Eventsourced.scala

@@ -10,6 +10,7 @@ import scala.collection.immutable
 
 import akka.japi.{ Procedure, Util }
 import akka.persistence.JournalProtocol._
+import akka.actor.AbstractActor
 
 /**
  * INTERNAL API.
@@ -292,7 +293,7 @@ abstract class UntypedEventsourcedProcessor extends UntypedProcessor with Events
  * [[PersistentBatch]] messages. In this case an `UnsupportedOperationException` is
  * thrown by the processor.
  */
-abstract class AbstractEventsourcedProcessor extends EventsourcedProcessor {
+abstract class AbstractEventsourcedProcessor extends AbstractActor with EventsourcedProcessor {
   /**
    * Java API: asynchronously persists `event`. On successful persistence, `handler` is called with the
    * persisted event. It is guaranteed that no new commands will be received by a processor

akka-persistence/src/main/scala/akka/persistence/Processor.scala

@@ -444,4 +444,4 @@ abstract class UntypedProcessor extends UntypedActor with Processor
  * @see [[Recover]]
  * @see [[PersistentBatch]]
  */
-abstract class AbstractProcessor extends Processor
+abstract class AbstractProcessor extends AbstractActor with Processor

akka-persistence/src/main/scala/akka/persistence/View.scala

@@ -203,4 +203,4 @@ abstract class UntypedView extends UntypedActor with View
  *
  * @see [[View]]
  */
-abstract class AbstractView extends View
+abstract class AbstractView extends AbstractActor with View