Fixes #14097 - Only run DatabaseCleaner truncation on JS tests

Problem:
DatabaseCleaner runs after all integration tests, on truncation mode.
However, for tests where we use rack-test instead of poltergeist, this
is not necessary and slows down the test suite....

Fixes #14191 - remove simplecov test coverage reporting

fixes #13980 - don't merge NIC compute attrs on New Host form

Removes merging of NIC's compute attributes when refreshing interfaces
on compute profile or resource selections on the New Host form. Instead,
overwrite NIC attributes from the profile (as it did before 85e82d0) as...

Fixes #14184 - allow filter creation for users with taxonomies

fixes #14179 - don't merge NIC compute attrs in ComputeProfileMerge

When creating a host over the API and specifying interface compute
attributes, the interface attributes were overwritten from the compute
profile. Example request:

{"host":{"interfaces_attributes":{"0":{"primary":"true","compute_attributes":{"model":"e1000"}}}, ...}}...

Fixes #6924 - Additional validations for Setting

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 #14155 - fix leaks between tests with random ordering

- A test for the Rabl use_controller_name_as_json_root extension was
leaking as the old value was only reset in `setup` methods. When the
test was last in the test case, the configuration wasn't reset....

Fixes #14154 - fix adrift reports show page

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