second round of FiniteDuration business, including cluster fixes

- make Scheduler only accept FiniteDuration, which has quite some
  knock-on effects

akka-docs/java/code/docs/actor/japi/FaultHandlingDocSample.java

@@ -139,7 +139,7 @@ public class FaultHandlingDocSample {
       if (msg.equals(Start) && progressListener == null) {
         progressListener = getSender();
         getContext().system().scheduler().schedule(
-            Duration.Zero(), Duration.parse("1 second"), getSelf(), Do, getContext().dispatcher()
+            Duration.Zero(), Duration.create(1, "second"), getSelf(), Do, getContext().dispatcher()
         );
       } else if (msg.equals(Do)) {
         counterService.tell(new Increment(1), getSelf());
@@ -299,7 +299,7 @@ public class FaultHandlingDocSample {
         counter.tell(new UseStorage(null), getSelf());
         // Try to re-establish storage after while
         getContext().system().scheduler().scheduleOnce(
-                Duration.parse("10 seconds"), getSelf(), Reconnect, getContext().dispatcher()
+                Duration.create(10, "seconds"), getSelf(), Reconnect, getContext().dispatcher()
         );
       } else if (msg.equals(Reconnect)) {
         // Re-establish storage after the scheduled delay

akka-docs/java/code/docs/future/FutureDocTestBase.java

@@ -518,7 +518,7 @@ public class FutureDocTestBase {
     //#after
     final ExecutionContext ec = system.dispatcher();
     Future<String> failExc = Futures.failed(new IllegalStateException("OHNOES1"));
-    Future<String> delayed = Patterns.after(Duration.parse("500 millis"),
+    Future<String> delayed = Patterns.after(Duration.create(500, "millis"),
       system.scheduler(), ec,  failExc);
     Future<String> future = future(new Callable<String>() {
       public String call() throws InterruptedException {

akka-docs/java/code/docs/zeromq/ZeromqDocTestBase.java

@@ -187,7 +187,7 @@ public class ZeromqDocTestBase {
     @Override
     public void preStart() {
       getContext().system().scheduler()
-          .schedule(Duration.parse("1 second"), Duration.parse("1 second"), getSelf(), TICK, getContext().dispatcher());
+          .schedule(Duration.create(1, "second"), Duration.create(1, "second"), getSelf(), TICK, getContext().dispatcher());
     }
 
     @Override