Fix/helmresponse

[TsuyoshiUshio]

I have several fix for this pull request.

• Task succeeds even if operation fails

I fix this problem.

Also, The old repo several problem.

• unit testing execute un "execSync" command for mock testing.

Mock response execute execute task

Also, I found some unnecessary Promise on async method. However, test fails when I use "await exec()" problem still remains. However it is acceptable.