rackerlabs/quark — pull request #150 by asadoughi (2014-06-11 21:39:51+00:00)
Title: Fixes alembic migrations for RM6804

* Absorbs 56* revision (subnet_id, address unique constraint) into
18* (initial revision); oblige already contained the changes in
56* and prod databases were stamped to 18* so it makes sense to
absorb contents of 56* into 18*.

* MacAddress.address is already a primary key; removes
UniqueConstraint on (mac_address_range_id, address) from model.

* Removes added MacAddress unique constraint from 43* revision.