Accept infra_failed as a result in jobstep_details
Accept infra_failed as a result in jobstep_details

Summary: Infrastructure failures can occur within changes-client, and we need to be able to report them.

Test Plan: None

Reviewers: paulruan

Reviewed By: paulruan

Subscribers: mkedia

Differential Revision: https://tails.corp.dropbox.com/D128322

dropbox/changes,bowlofstew/changes,dropbox/changes,bowlofstew/changes,wfxiang08/changes,wfxiang08/changes,bowlofstew/changes,wfxiang08/changes,dropbox/changes,dropbox/changes,bowlofstew/changes,wfxiang08/changes