fixes #14638 - Refactor Subnet into STI to allow different subnet types

Fixes #6959 - set operating system for RHEV/ovirt VMs

Backward compatible, but works best with https://github.com/abenari/rbovirt/pull/104

Fixes #9470 - Adds an option to send puppet error emails for all host to a user

Adds an option to the puppet error state notification - Subscribe to all hosts, when error occurs from any authorize host, the user will get an email

Fixes #13545 - STI permission checking always using base class

This fixes permission checks on STI objects. Due to these methods existing
in Procs and being included in the base class at run time resource_class was
returning the base class. I can only presume this is related to a ruby or rails 4...

Fixes #3582 - Parameters on subnets

Fixes #14078 - Correct provision template permission names in seeds and fixtures

Fixes #13896 - Rename Anonymous role to Default role

Fixes #9425 - Remove the Default User role

The Default User role is not actually used anywhere, and causes
confusion with the Anonymous role. Removing it.

fixes #13938 - remove reports fixtures

Under Rails 4.2, the rendering of the config_reports#show page was
failing as the reports fixtures referenced hosts that didn't exist.
Presence of host_id is validated under normal circumstances.

Fixes #12718 - smart proxy log table

This patch adds a table with logs fetched from Smart Proxy /logs new API. It
returns latest N log entries from a simple memory buffer. The table supports
filtering by level, custom filtering and it introduces several overview...