Fixes #14586 - Associate default templates to Orgs and Locs during seed

Fixes #14330 - Provide option in hammer to change display type for
libvirt compute resource

refs #9470 - set :limit on column, fix MailNotification initializer

MailNotification.new failed unless it had a Hash argument, hence the
factory had been changed from default behaviour. It also then ignored
all attributes except a given few listed in initialize_with.

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 #3582 - Parameters on subnets

fixes #14094 - replace foreign_keys calls with foreign_key_exists?

foreign_keys throws an exception under SQLite in Rails 4.2, so prefer
the _exists? call to check for presence of a key as it returns false on
DBs without FK support.

fixes #14093 - remove unused permissions column from roles

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

fixes #14076 - remove unused Puppetclass hostgroups counter

Fixes #13711 - fix subnet/domain validation during creation