fix upstream bug with validate_network_vlan_ranges

Change-Id: I523d37a1f8955bd65785b15d25490f739aa43d47
minor fix + ml2 start

Change-Id: I4e2bfb13b285679f017775f90f6fe76e6c8b4e39
vlan'

Change-Id: I87d6702c5e89dd4c0e78e9a69dbcc9072eff85bf
Revert "fix upstream bug with validate_network_vlan_ranges"

This reverts commit 378b571afddd329c20e630efd4ed5804d2492fce.
ml2 plugin tests for VLAN and GRE

Change-Id: I27c9a8558d52677f4fdd216865125d0a8c57b119