Review comments

src/main/java/io/cdap/plugin/servicenow/source/ServiceNowRecordReader.java

@@ -20,16 +20,12 @@
 import io.cdap.cdap.api.data.schema.Schema;
 import io.cdap.plugin.servicenow.apiclient.ServiceNowTableAPIClientImpl;
 import io.cdap.plugin.servicenow.connector.ServiceNowRecordConverter;
-import io.cdap.plugin.servicenow.util.ServiceNowConstants;
 import io.cdap.plugin.servicenow.util.ServiceNowTableInfo;
 import io.cdap.plugin.servicenow.util.SourceQueryMode;
 import org.apache.hadoop.mapreduce.InputSplit;
 import org.apache.hadoop.mapreduce.TaskAttemptContext;
-import org.apache.oltu.oauth2.common.exception.OAuthProblemException;
-import org.apache.oltu.oauth2.common.exception.OAuthSystemException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
@@ -50,7 +46,7 @@ public ServiceNowRecordReader(ServiceNowSourceConfig pluginConf) {
   @Override
   public void initialize(InputSplit split, TaskAttemptContext context) {
     initialize(split);
-    fetchSchema(new ServiceNowJobConfiguration(context.getConfiguration()).getTableInfos(), tableName);
+    fetchAndInitializeSchema(new ServiceNowJobConfiguration(context.getConfiguration()).getTableInfos(), tableName);
   }
 
   /**
@@ -124,7 +120,13 @@ protected void initialize(InputSplit split) {
     tableNameField = pluginConf.getTableNameField();
   }
 
-  private void fetchSchema(List<ServiceNowTableInfo> tableInfos, String tableName) {
+  /**
+   * Fetches the schema of the given tableName from the tableInfos and initialize schema using it.
+   *
+   * @param tableInfos List of TableInfo objects containing TableName, RecordCount and Schema.
+   * @param tableName Table Name to initialize this reader for.
+   */
+  private void fetchAndInitializeSchema(List<ServiceNowTableInfo> tableInfos, String tableName) {
     Schema tempSchema = tableInfos.stream()
         .filter((tableInfo) -> tableInfo.getTableName().equalsIgnoreCase(tableName))
         .findFirst().get().getSchema();