* Password verification and v-for add key

* DAG automatic layout

* combo.js replacement

* combo.js replacement

* webpack upgrade to 4

* packjson has a file name that has not changed

* misspell  words

* modify common queue TaskQueueZKImplTest.java unit test

* extends  BaseTaskQueueTest get zkServer

* modify zk config

* fix issue:1477 some tasks would be running all the time when db delayed

* fix issue:1477 some tasks would be running all the time when db delayed

* fix issue:1477 some tasks would be running all the time when db delayed

* dateutil test

* pom.xml

* Password verification and v-for add key

* DAG automatic layout

* add ZkServer for UT

* Add FileUtilsTest.java , the unit test for FileUtils (#1493) (#1)

* updates for reference ZkServer

* fix AbstractTask's handle method exception

* update ut

* add Spark Version in Spark Component

add Spark Version in Spark Component

* add license for SparkVersion.class

add license

* 1 add spark task UT
2 add spark version param check

* add assert check for sparkTaskTest

* fix：When there are multiple nodes, the monitoring center dashboard displays only one node.

* fix：Catching exceptions and printing exception information

* fix：rollback

* fix：getting project name field bug

update Get Help part

To improve user experience in datasource page, add default port for each type database.

1. When create or edit datasource, there is a default vaule for port. If user changes type, the default value changes.
2. Use local variables in browser memory, to cache user previous input port for each type. For example :
	     time-a:  MySQL default  port is 3306 , user change 3306 to 4000.
         time-b:  User change type from MySQL to ClickHouse , the port change  from 4000 to 8123.
         time-c:  User change type from ClickHouse back to MySQL，the port change from 8123 to 4000，use previous input cache to fillback.

3. In edit datasource page, when the page first loads, use the query value fillback instead of default value.

When the email is empty , it wll be nullpointexception.

So i fix it with null check.

- compatible with pstree command
- compatible with create user command
- compatible with list user command

* ut report

* codecov

* codecov test

* codecov

Now all datatype use same method ` stmt.setString(index,value);` even DATE and TIMESTAMP.

So i had improved it. If datatype is DATE use `stmt.setDate(index, java.sql.Date.valueOf(value));` , if datatype is TIMESTAMP use `stmt.setTimestamp(index, java.sql.Timestamp.valueOf(value));`.i

When use DATE the param format must use $[yyyy-MM-dd] , When use TIMESTAMP the param format must use $[yyyy-MM-dd hh:mm:ss].

public static final String JDBC_POSTGRESQL_CLASS_NAME = "org.postgresql.Driver";

and

public static final String ORG_POSTGRESQL_DRIVER = "org.postgresql.Driver";
There are same effect, We can only use one of them.