[Fix-4929][dao]fix ClassCastException when run hive sql with udf (#4930)

* ambari2.7.5+hdp3.1兼容ds1.3插件

* params.py

* delete unuseless code

* fix class cast exception

Co-authored-by: 李巨丰 <lijf@2345.com>

dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/entity/UdfFunc.java

@@ -230,7 +230,7 @@ public class UdfFunc {
             if (StringUtils.isBlank(key)) {
                 return null;
             }
-            return JSONUtils.parseObject(key);
+            return JSONUtils.parseObject(key, UdfFunc.class);
         }
     }
 }