Adding VPC support to the Cisco plugin

Adding VPC(Virtual Port Channel) support to the Cisco plugin.

Change-Id: I898e4355d05f6f43593deb2d977dfc1e55fb2fc8
Implements: Blueprint cisco-plugin-vpc-support
Disallow non-admin to specify binding:profile

Change-Id: Iefa4b251f3b0a373fb9b2b7d576e14d58afece59
Fixes-Bug: #1214873
Implement MidoNet Neutron plugin for Havana

Implement L2, L3, security groups, metadata server support for
MidoNet Neutron plugin for Havana.

blueprint https://blueprints.launchpad.net/neutron/+spec/midonet-plugin-havana
a
Change-Id: I0dd1a2ca17d760443c4c7a464a66b6d0a2cf194a
to merge

Change-Id: Ieca6972b0d15a736d28faee3d3dccfc159be50ea