[Improvement-4624] When the server exist in the dead server list of zk,need stop service byself (#4626)

* [Improvement-4624] When the server exist in the dead server list of zk,need stop service byself

* [Improvement-4624]fix check style and add MaterRegistryTest

* [Improvement-4624]fix check style and add ZookeeperRegistryCenterTest

* [Improvement-4624]fix check style and add ZookeeperRegistryCenterTest

* [Improvement-4624]add RegisterOperatorTest

* [Improvement-4624]update RegisterOperatorTest

* [Improvement-4624]resolve code smell

* [Improvement-4624]revert LICENSE-@form-create-element-ui