Error message for server response is not in Json format in 1.2.0

[carolwu-1206]

Issue Description

bug report

Describe what happened (or what feature you want)

In former version(0.9.0), the error message was in Json format like

{"code":604,"success":false,"error":"adfaefaf process not found exit status 1"}

However, in 1.2.0, it is like

`/opt/chaosblade-1.2.0/blade create process kill --process-cmd adfaefaf`: cmd exec failed, err: {"code":47002,"success":false,"error":"invalid parameter `process-cmd`, `adfaefaf` process not found","result":"invalid parameter `process-cmd`, `adfaefaf` process not found"}

There is no release note explaining reason for this change. The free format response is hard for to parse.

Describe what you expected to happen

Server response error message is in Json format.

How to reproduce it (as minimally and precisely as possible)

http://IP:Port/chaosblade?cmd=create%20process%20kill%20--process-cmd%20adfaefaf
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Tell us your environment

Anything else we need to know?

[xcaspar]

I tested it but it didn't reproduce the problem.

[carolwu-1206]

This issue occurs on server response only
0.9.0

0.1.2

[xcaspar]

Yes, it's a bug. I will fix it in the next version.