Cable status schema migration is broken

[jeremystretch]

Environment

• Python version: 3.6.8
• NetBox version: 2.7-beta1

Steps to Reproduce

1. Migrate a v2.6 database to v2.7-beta1
2. View the cables list

Expected Behavior

The legacy status BooleanField is migrated to a CharField as part of the upgrade. True should be replaced with connected and False should be replaced with planned.

Observed Behavior

The status field is retaining the string form of its previous boolean value (e.g. true or false). The first six cables in the example below have had their statuses corrected manually via the NetBox UI:

netbox=> select id, status from dcim_cable order by id limit 10;
 id |  status   
----+-----------
  1 | planned
  2 | planned
  3 | planned
  4 | connected
  5 | connected
  6 | connected
  7 | true
  8 | true
  9 | true
 10 | true