[MESOS-8173] Improve fetcher exit status message

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.5.0
• Component/s: fetcher
• Assignee: James Peach
• Reporter: James Peach
• Created: 06/Nov/17 18:45
• Updated: 06/Nov/17 23:23
• Resolved: 06/Nov/17 23:23

Description

When the fetcher fails, we emit a message:

        return Failure("Failed to fetch all URIs for container '" +
                       stringify(containerId) +
                       "' with exit status: " +
                       stringify(status.get()));

But `status` is the return value from wait(2) so we should be using WSTRINGIFY.