ErrorPayloadMapper does not cope with "errors"

[ericbottard]

Testing against PWS, requesting a task that does not exist, ErrorPayloadMapper fails to parse the returned payload properly. It expects a single error object, while what I get is an errors map.

See below

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/137028369

The labels on this github issue will be updated when the story is started.