[BugFix: ZSTACK-32171] fix AddBackendServerToServerGroup cli when param is json
[BugFix: ZSTACK-32171]
fix AddBackendServerToServerGroup cli when param is json

zstackorg/zstack-utility,zstackio/zstack-utility,zstackorg/zstack-utility,zstackio/zstack-utility,zstackio/zstack-utility,zstackorg/zstack-utility