fix sed invoking error of change hostname in mn_ha2
fix sed invoking error of change hostname in mn_ha2

zstackio/zstack-woodpecker,zstackio/zstack-woodpecker,zstackorg/zstack-woodpecker,zstackorg/zstack-woodpecker,zstackio/zstack-woodpecker,zstackorg/zstack-woodpecker