API tests: Check MTU sanity of trunk/subport

The MTU of VLAN subinterfaces must not be greater than
MTU of the trunk port. This commit adds API tests that
check that API follows theses guidelines

Change-Id: Ib40c4d44a97b6c9183d48e79383d88dbf2c952db
Partially-Implements: blueprint vlan-aware-vms
3 files changed
tree: 69c1d95b8a2ead2d0c1b98b261cf7fef85884954
  1. neutron/