commit 232642c736bf12ba1f03239c4ce91377ee83cc63
author Armando Migliaccio <armamig@gmail.com> Wed Jul 20 16:28:24 2016 -0700
committer Armando Migliaccio <armamig@gmail.com> Wed Jul 20 16:46:06 2016 -0700
tree 3ea7bea35da741465f79e0cac12d485f1bf588f6
parent 1545c4f9584f0d79cc98eea31d6ec0d48793b777

Enable passive deletes on trunk deletion

Add missing sqlalchemy cascade="all, delete-orphan" on the
trunk-subports relationship to disable child object loading
on a trunk delete operation, otherwise sqlalchemy would
attempt to update the children with a NULL key, and cause
an integrity violation.

Deleting a trunk with subports is allowed, and a test is
added to cover that.

Partially-implements: blueprint vlan-aware-vms

Change-Id: I143c436ce6d2d3a441c26a4b08730981f1ec2973