DO NOT MERGE WIP: Nw policy updates#105

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chrisplo wants to merge 3 commits intocontiv:masterfrom

chrisplo:nw_policy_updates

Commits on Jan 23, 2018

Rewrite metadata and add tenant policy
chrisplo
committed

Commits on Jan 25, 2018

fixing test cases, replace Vrfmetadata func
chrisplo
committed

Commits on Jan 26, 2018

return on missing vrf with epg
chrisplo
committed