fix the status message (#1063)

* 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

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/AccessTokenService.java

@@ -117,7 +117,7 @@ public class AccessTokenService extends BaseService {
         if (insert > 0) {
             putMsg(result, Status.SUCCESS);
         } else {
-            putMsg(result, Status.CREATE_ALERT_GROUP_ERROR);
+            putMsg(result, Status.CREATE_ACCESS_TOKEN_ERROR);
         }
 
         return result;