* mutil go routine do registerNode and  deleteNode
Signed-off-by: Nxige-16 <xi.ge@zilliz.com>

* code format
Signed-off-by: Nxige-16 <xi.ge@zilliz.com>

* stop retry create querynode client
Signed-off-by: Nxige-16 <xi.ge@zilliz.com>