fixes #2083 - DB migration fails with Postgres with bmc nics

fixed postgres migrations

fixes #1814 - converts sp_* attributes into a BMC interface class

this patch also includes the following

• added a new interfaces table, and STI objects to represent a NIC, BMC, Managed
  and a bootable interface.
• refactored DHCP/DNS orchestation code, so they can work on the...

- Allows mysql2 usage with Puppet < 2.7.10 - Fixes #1350

Fixes #2059: Completely remove email_replay_address from settings

fixes #1964 lookup_keys.default_value can hold > 255 characters

replaced default taxonomy migration with a multiple actions for assigning hosts to orgs and locations.

Initial migration fixes for postgresql

ensure all taxonomies migration pass on pgsql as well.

Add organization and location to foreman.

This feature allows foreman to provide multi location, multi tenant and
multi organizations capablities.

the idea is that resources within foreman (e.g. hosts, subnets, users,
environments etc) can belong to one or more locations and organization,...