Improved API of OneForOneStrategy and AllForOneStrategy. See #1714

* withinTimeRange: Duration
* Removed need for Options in API

akka-docs/java/code/akka/docs/actor/FaultHandlingTestBase.java

@@ -52,7 +52,7 @@ public class FaultHandlingTestBase {
           return escalate();
         }
       }
-    }, 10, 60000);
+    }, 10, Duration.parse("1 minute"));
 
     @Override
     public SupervisorStrategy supervisorStrategy() {
@@ -89,7 +89,7 @@ public class FaultHandlingTestBase {
           return escalate();
         }
       }
-    }, 10, 60000);
+    }, 10, Duration.parse("1 minute"));
 
     @Override
     public SupervisorStrategy supervisorStrategy() {