fix(接口测试): 修复场景导入jmx时提取参数组件未给默认值的问题

--bug=1048030 --user=宋天阳 【场景导入】-使用jmx文件导入场景，请求的json提取器导入后，提取的参数类型为空 https://www.tapd.cn/55049933/s/1597746

backend/services/api-test/src/main/java/io/metersphere/api/parser/ms/http/post/JSONPostProcessorConverter.java

@@ -16,7 +16,7 @@ public class JSONPostProcessorConverter extends AbstractMsElementConverter<JSONP
         jsonPathExtract.setVariableName(element.getRefNames());
         jsonPathExtract.setExpression(element.getJsonPathExpressions());
         jsonPathExtract.setEnable(element.isEnabled());
-
+        jsonPathExtract.setVariableType("TEMPORARY");
         if (StringUtils.equalsIgnoreCase(element.getMatchNumbers(), "-1")) {
             jsonPathExtract.setResultMatchingRule(ResultMatchingExtract.ResultMatchingRuleType.ALL.name());
             jsonPathExtract.setResultMatchingRuleNum(-1);

backend/services/test-plan/src/main/java/io/metersphere/plan/service/TestPlanApiCaseService.java

@@ -291,6 +291,7 @@ public class TestPlanApiCaseService extends TestPlanResourceService {
         environmentExample.createCriteria().andIdIn(caseEnvIds);
         List<Environment> caseEnv = environmentMapper.selectByExample(environmentExample);
         Map<String, String> caseEnvMap = caseEnv.stream().collect(Collectors.toMap(Environment::getId, Environment::getName));
+
         apiCaseList.forEach(item -> {
             item.setProjectName(projectMap.get(item.getProjectId()));
             item.setCreateUserName(userMap.get(item.getCreateUser()));