fixes #2254 - Add STI to hosts table

Signed-off-by: Joseph Mitchell Magen <jmagen@redhat.com>
Signed-off-by: Ohad Levy <ohadlevy@gmail.com>

fixes #2229 add an IAM role field to a compute image.

This allows use of IAM to control access to AWS services within an instance.

fixes #1999 - Allow org/location to selectively ignore a domain, subnet etc

TODO: excluding views

fixes #2126 Large report messages won't fit in PostgreSQL's index_messages_on_value

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