fix(性能测试): 修复测试存在csv的时候不能正常下载zip的问题

--bug=1018966 --user=刘瑞斌 【性能测试】接口自动化有csv文件-创建性能测试-选择local资源池-执行状态一直是starting https://www.tapd.cn/55049933/s/1279521

performance-test/backend/src/main/java/io/metersphere/parse/xml/reader/JmeterDocumentParser.java

@@ -259,8 +259,8 @@ public class JmeterDocumentParser implements EngineSourceParser {
         }
         StringBuilder csv = new StringBuilder();
         Object config = ((Map) csvConfig).get(filename);
-        boolean csvSplit = (Boolean) ((Map) (config)).get("csvSplit");
-        if (!csvSplit) {
+        Boolean csvSplit = (Boolean) ((Map) (config)).get("csvSplit");
+        if (!BooleanUtils.toBoolean(csvSplit)) {
             return;
         }
         boolean csvHasHeader = (Boolean) ((Map) (config)).get("csvHasHeader");