fix(测试跟踪): 修复测试计划内查看未通过状态的用例时报错的问题

--bug=1015332 --user=宋天阳 【测试计划】执行接口case，查看执行结果报“Unexpected token c in
JSON at position 2” https://www.tapd.cn/55049933/s/1210638

backend/src/main/java/io/metersphere/api/service/ApiDefinitionService.java

@@ -1475,10 +1475,10 @@ public class ApiDefinitionService {
                 content.put("envName", this.getEnvNameByEnvConfig(result.getProjectId(), result.getEnvConfig()));
             }
             contentStr = content.toString();
+            reportResult.setContent(contentStr);
         } catch (Exception e) {
             LogUtil.error("解析content失败!", e);
         }
-        reportResult.setContent(contentStr);
         return reportResult;
     }