updated dir name

Author: Nitish1814

spark/core/src/main/java/zingg/spark/core/preprocess/SparkPreprocMap.java

@@ -13,7 +13,7 @@
 import zingg.common.core.preprocess.IPreprocType;
 import zingg.common.core.preprocess.IPreprocTypes;
 import zingg.common.core.preprocess.IPreprocessor;
-import zingg.spark.core.preprocess.caseNormalize.SparkCaseNormalizer;
+import zingg.spark.core.preprocess.casenormalize.SparkCaseNormalizer;
 import zingg.spark.core.preprocess.stopwords.SparkStopWordsRemover;
 
 public class SparkPreprocMap implements IPreprocMap<SparkSession,Dataset<Row>,Row,Column,DataType> {

spark/core/src/main/java/zingg/spark/core/preprocess/caseNormalize/SparkCaseNormalizer.java spark/core/src/main/java/zingg/spark/core/preprocess/casenormalize/SparkCaseNormalizer.java

@@ -1,19 +1,15 @@
-package zingg.spark.core.preprocess.caseNormalize;
+package zingg.spark.core.preprocess.casenormalize;
 
 import org.apache.spark.sql.Column;
 import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.Row;
 import org.apache.spark.sql.SparkSession;
 import org.apache.spark.sql.types.DataType;
-import scala.collection.JavaConverters;
-import scala.collection.Seq;
 import zingg.common.client.FieldDefinition;
 import zingg.common.client.ZFrame;
 import zingg.common.core.context.IContext;
 import zingg.common.core.preprocess.casenormalize.CaseNormalizer;
-import zingg.spark.client.SparkFrame;
 
-import java.util.ArrayList;
 import java.util.List;
 
 import static org.apache.spark.sql.functions.lower;

spark/core/src/test/java/zingg/spark/core/preprocess/caseNormalize/TestSparkCaseNormalizer.java spark/core/src/test/java/zingg/spark/core/preprocess/casenormalize/TestSparkCaseNormalizer.java

@@ -1,4 +1,4 @@
-package zingg.spark.core.preprocess.caseNormalize;
+package zingg.spark.core.preprocess.casenormalize;
 
 import org.apache.spark.sql.Column;
 import org.apache.spark.sql.Dataset;