shell: JSON output supported for more commands

[acelyc111]

cluster_info:

• remove useless output lines
• add options: [-r|--resolve_ip], [-o|--output file_name] and [-j|--json_pretty]

app:

• remove useless output lines
• add options: [-r|--resolve_ip], and [-j|--json_pretty]

app_disk:

• remove useless output lines
• add option: [-j|--json_pretty]
• output partitions not counted and replicas not counted by default

app_stat:

• remove useless output lines
• add option: [-j|--json_pretty]

get_app_envs:

• remove useless output lines
• add option: [-j|--json_pretty]

在这些命令都支持你json格式化输出后, 一些运维脚本也可从shell脚本改成python等语言, 提高可读性

[qinzuoyan]

更新下rdsn