clean the code

src/test/java/com/microsoft/azure/kusto/kafka/connect/sink/formatWriter/JsonRecordWriterProviderTest.java

@@ -4,7 +4,12 @@ import com.microsoft.azure.kusto.kafka.connect.sink.format.RecordWriter;
 import org.apache.kafka.connect.sink.SinkRecord;
 import org.junit.Test;
 
-import java.io.*;
+import java.io.File;
+import java.io.IOException;
+import java.io.FileOutputStream;
+import java.io.OutputStream;
+import java.io.BufferedReader;
+import java.io.FileReader;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;

src/test/java/com/microsoft/azure/kusto/kafka/connect/sink/formatWriter/StringRecordWriterProviderTest.java

@@ -5,7 +5,12 @@ import org.apache.kafka.connect.data.Schema;
 import org.apache.kafka.connect.sink.SinkRecord;
 import org.junit.Test;
 
-import java.io.*;
+import java.io.File;
+import java.io.IOException;
+import java.io.FileOutputStream;
+import java.io.OutputStream;
+import java.io.BufferedReader;
+import java.io.FileReader;
 import java.util.ArrayList;
 import java.util.List;