There were a few changes needed:
* Plugins are now specified through `plugin:` config keyword.
* All plugin gems need to be specified explicitly in Gemfile since they
are no longer dependencies of plugins already specified explicitly.
* All plugin gems need to be updated in other to use the new APIs.
* One cop was renamed.
* New offenses safe to correct were corrected directly with `bundle exec
rubocop -a`.
* New offenses unsafe to correct were added to the TODO configuration
with `bundle exec rubocop --auto-gen-config --auto-gen-only-exclude
--exclude-limit 1400 --no-auto-gen-timestamp`.
The first test tokens had an inconsistent client_id and I had to
introduce multiple mappings to get the right config. But that has been
harmonised and we can put the config in one place.
Rails 4.1 added time helpers but we never bothered using them. But now
I'm getting rid of the Timecop dependency and use standard helpers.
Beware though that the new helpers always freeze time. When you travel
to a certain date then the clock stops ticking while Timecop maintained
the passing of time.
The freezing of time could cause problems if you are trying to enforce a
timeout. But all current specs don't seem affected.
In most cases, the freezing will make it easier to avoid flaky specs.
I removed the caching of `managed_enterprises` in Permissions because
it's just a scope and calling it again is very cheap. And that makes the
method a lot easier to read now that we have a conditional here.
Accessing the managed enterprises via the user instead of a separate
scope on the Enterprise model also reduce the SQL queries. We may want
to use this method in more places. I prefer to keep the
admin-conditional in a permissions class instead of in the model.
