Exclude curator in thrift server pom to avoid conflict jars

Currently, thrift server has a dependency of curator-client:2.12.0 through the hive service. After the build, a curator-client-2.12.0.jar file will be generated in the jars folder. It is conflicted with the curator-client-2.7.1.jar file, which is used by livy server.

We observed that in some JDK, the curator-client-2.12.0.jar is loaded before the curator-client-2.7.1.jar, and will crash the recovery enabled livy server.