KAFKA-1729; (followup patch)Add constructor to javaapi to allow

constructing explicitly versioned offset fetch requests; reviewed by Jun Rao

core/src/main/scala/kafka/javaapi/OffsetFetchRequest.scala

@@ -28,6 +28,14 @@ class OffsetFetchRequest(groupId: String,
                          correlationId: Int,
                          clientId: String) {
 
+  def this(groupId: String,
+           requestInfo: java.util.List[TopicAndPartition],
+           correlationId: Int,
+           clientId: String) {
+    // by default bind to version 0 so that it fetches from ZooKeeper
+    this(groupId, requestInfo, 0, correlationId, clientId)
+  }
+
   val underlying = {
     val scalaSeq = {
       import JavaConversions._
@@ -36,7 +44,7 @@ class OffsetFetchRequest(groupId: String,
     kafka.api.OffsetFetchRequest(
       groupId = groupId,
       requestInfo = scalaSeq,
-      versionId = 0, // binds to version 0 so that it commits to Zookeeper
+      versionId = versionId,
       correlationId = correlationId,
       clientId = clientId
     )