When specifying a view type that isn't supported by any modules (such as
"list-view" instead of "list"), this ensures that the user is guided
towards something correct.
This changes the error message in this case from:
AttributeError: 'NoneType' object has no attribute 'name'
to:
jenkins_jobs.errors.JenkinsJobsException: Unrecognized view type: list-view (supported types are: list, pipeline)
Change-Id: I0ee800db1c9c8aeecffcf11f1e86c03ba0590da8