Fixes #844 #5725 - correct hosts count in puppetclass

Refs #969 - Foreman-side changes for serving templates from the proxy

fixes #7586, #7734, #7172 - user preferences for receiving mail notifications

Adds a framework for user-selectable mail notifications. The work is
still done in ActionMailer classes and launch by rake in cron, however a
wrapper called MailNotification is used to provide RBAC and make the...

Fixes #3260- Allows puppet to manage value of smart class parameter that can be overrided

fixes #7975 - Subnet names should be unique

Fixes #3309 - Support deep merging of hash and array structures in smart class parameters

fixes #4439 - ensure user logins are handled case insensitively

Fixes #5139 - leftovers subscribe_to_all_hostgroups

Remove user_xxx unnecessary tables and notices

Update subhostgroups removed

Fixes for migration of foreign keys

Remove users from compute_resource fixture

Remove table notices after fk are removed for pg/mysql

Fixes #7401 - Add support for bonds

Renames physical_device to attached_to and move the virtual device
form out of BMC.
Extends the form for Bond devices
Allow configuration of bonds in KS template
Parsing of Bond interfaces from facts
Mac address is required only for physical devices

Refs #3809 - Fix a few rubocop TODOs