* dolphinscheduler-api.pom resolve curator-client conflict
the ds use curator-client:4.3.0 dependency by curator-frameworke,
but hadoop-common use curator-client:2.7.1,
so make the ClassNotFoundException
```
Caused by: java.lang.ClassNotFoundException: org.apache.curator.connection.StandardConnectionHandlingPolicy
```
exclue curator-client in hadoop-common to resolve this
* resolve curator-client dependency confliction
## What is the purpose of the pull request
the ds use curator-client:4.3.0 dependency by curator-frameworke,
but hadoop-common use curator-client:2.7.1,
so make the ClassNotFoundException
```
Caused by: java.lang.ClassNotFoundException: org.apache.curator.connection.StandardConnectionHandlingPolicy
```
exclue curator-client in hadoop-common to resolve this