Remove calls to policy.check and policy.enforce from plugin code

Completes blueprint make-authz-orthogonal

This patch removes a few explicit policy checks recently added to
the plumgrid and cisco plugins.
They are not necessary as the same checks are already performed
by the policy engine.

Change-Id: Ie99f5fa6ad4a9568b050827bc479a62dd40e18ac
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
Merge "Remove calls to policy.check and policy.enforce from plugin code"
Merge "Adding VPC support to the Cisco plugin"