more updates for Flink

more fix

jvm-packages/xgboost4j-flink/src/main/scala/ml/dmlc/xgboost4j/scala/flink/XGBoost.scala

@@ -70,7 +70,7 @@ object XGBoost {
     * @param modelPath The path that is accessible by hadoop filesystem API.
     * @return The loaded model
     */
-  def loadModelFromHadoop(modelPath: String) : XGBoostModel = {
+  def loadModelFromHadoopFile(modelPath: String) : XGBoostModel = {
     new XGBoostModel(
       XGBoostScala.loadModel(
         FileSystem

jvm-packages/xgboost4j-flink/src/main/scala/ml/dmlc/xgboost4j/scala/flink/XGBoostModel.scala

@@ -31,7 +31,7 @@ class XGBoostModel (booster: Booster) extends Serializable {
     *
     * @param modelPath The model path as in Hadoop path.
     */
-  def saveModelToHadoop(modelPath: String): Unit = {
+  def saveModelAsHadoopFile(modelPath: String): Unit = {
     booster.saveModel(FileSystem
       .get(new Configuration)
       .create(new Path(modelPath)))