1.7 compiler failure

fixes elastic#2294.

Author: kimchy

src/main/java/org/elasticsearch/action/support/replication/ShardReplicationOperationRequest.java

@@ -58,7 +58,7 @@ public ShardReplicationOperationRequest(T request) {
         super(request);
         this.timeout = request.timeout();
         this.index = request.index();
-        this.threadedOperation = request.threadedOperation;
+        this.threadedOperation = request.operationThreaded();
         this.replicationType = request.replicationType();
         this.consistencyLevel = request.consistencyLevel();
     }