Action item 28 - Fetch the log ,and then parse the error file-name.

To get the log of job.
And then use parse to get the error file-name if this job has error.
If get error file , show the json that contain date and error file .
Merge pull request #115 from promise82114/fetch

Issue 111 - Action item 28 - Fetch the log ,and then parse the error file-name.