* move updateTaskState into try/catch block in case of exception

* fix NPE

* using conf.getInt instead of getString

* for AbstractZKClient, remove the log, for it will print the same log message in createZNodePath.
for AlertDao, correct the spelling.

* duplicate

* refactor getTaskWorkerGroupId

* add friendly log

* update hearbeat thread num = 1

* fix the bug when worker execute task using queue. and remove checking Tenant user anymore in TaskScheduleThread

* 1. move verifyTaskInstanceIsNull after taskInstance
2. keep verifyTenantIsNull/verifyTaskInstanceIsNull clean and readable

* fix the message

* delete before check to avoid KeeperException$NoNodeException

* fix the message

* check processInstance state before delete tenant

* check processInstance state before delete worker group

* refactor

* merge api constants into common constatns

* update the resource perm

* update the dataSource perm

* fix CheckUtils.checkUserParams method

* update AlertGroupService, extends from BaseService, remove duplicate methods

* refactor

* modify method name

* add hasProjectAndPerm method

* using checkProject instead of getResultStatus

* delete checkAuth method, using hasProjectAndPerm instead.

* correct spelling

* add transactional for deleteWorkerGroupById

* add Transactional for deleteProcessInstanceById method

* change sqlSessionTemplate singleton

* change sqlSessionTemplate singleton and reformat code

* fix unsuitable error message

* update shutdownhook methods

* fix worker log bug

* fix api server debug mode bug

* upgrade zk version

* add ConnectionFactoryTest and ConnectionFactory read datasource from appliction.yml

* .escheduler_env.sh to dolphinscheduler_env.sh

* dao yml assembly to conf directory

* table name modify

* entity title table  name modify

* logback log name modify

* running through the big process

* running through the big process error modify

* logback log name modify

* data_source.properties rename

* logback log name modify

* install.sh optimization

* install.sh optimization

* command count modify

* command state update

* countCommandState sql update

* countCommandState sql update

* remove application.yml file

* master.properties modify

* install.sh modify

* install.sh modify

* api server startup modify

* the current user quits and the session is completely emptied. bug fix

* remove pom package resources

* add ConnectionFactoryTest and ConnectionFactory read datasource from appliction.yml

* .escheduler_env.sh to dolphinscheduler_env.sh

* dao yml assembly to conf directory

* table name modify

* entity title table  name modify

* logback log name modify

* running through the big process

* running through the big process error modify

* logback log name modify

* add druid connection provider in order to change quartz default connection pool

* remove c3p0 in escheduler-api and escheduler-dao

* change method name queryByIdAndIp to queryBySessionId and queryByUserIdAndIp to queryByUserId

* change connectionProvider.class from c3p0 to druid

* change connectionProvider.class from c3p0 to druid