Allow looking up resources for deferred models

Review Request #7603 — Created Aug. 20, 2015 and submitted — Latest diff uploaded

Information

Djblets
release-0.9.x

Reviewers

Previously, if you tried to look up the resource for a deferred model,
it would not return a resource. This has been corrected.

Attempted to look up the resource of a deferred model. It worked.

Ran unit tests.