Fix AccessPolicy update with added resources

This adds a test exposing bug #1286307 and moves the check for resources being
present from AccessPolicy's handle_create to check_create_complete. This defers
the check to a later point where the referenced resources are present.

Change-Id: I47573812a3f80f3ae5b858cca486ec5826f606fd
Closes-Bug: #1286307
Merge "Fix AccessPolicy update with added resources"