app payload导入L3_header特征配置时增加固定属性值；相关属性校验修改；导入模板批注修改

src/main/java/com/nis/web/controller/BaseController.java

@@ -2048,6 +2048,11 @@ public class BaseController {
 										appfeature.setCfgRegionValue(regionDict.getConfigRegionValue());
 										appfeature.setCfgRegionType(String.valueOf(regionDict.getRegionType()));
 									}
+									if(cfg.getDistrict().equals("L3_header")) {
+										appfeature.setIsHexbin(1);
+										appfeature.setExprType(3);
+										appfeature.setMatchMethod(0);
+									}
 									appFeatureIndexs.add(appfeature);
 									
 									ind++;