Refactor of usage dashboard (moved logic from JS to Ruby) (#2336) ...

* removed erroneous div tag

* Updated deep_copy on PLan model to set feedback_requested to false

* fixed typo in plan export

* refactored usage code to place most of the presentation logic into Rails instead of JS

finished up changes to usage

fixed eslinter issues

fixed rubocop issues

fixed additional rubocop issues

fixed issue with filter

fixed issue with totals

removed old controller test and added new usage_controller tests

added tests for new usage_helper

added usage_policy tests and pundit test helper

fixed some rubocop complaints

fixed up remaining rubocop issues

* removed opens in a new window for usage download buttons and moved org selector to below filters

* fixed some rubocop complaints in spec test

Started Services and Actions for #1689 (#1871) ...

StatCreatedPlan/StatJoinedUser Services and Action finished. #1689

removed comment. #1689

usage#all endpoint for all usage CSV reports. #1689

usage#all endpoint with request test associated. #1689

Removed require from files

Moved generate actions into services [#1689]

Renamed joined_user service related [#1689]

Renamed stat_created_plan action to service [#1689]

Removed action total_stat in favour of total_count_stat_service

UsageDownloadController using Org::TotalCountStatService instead of the action

Repair broken or pending specs (#1874) ...

- Fix pending Template model specs

- Fix pending model specs

- Fix broken/pending specs, including random "errors" bug

Add framework for RSpec integration tests

Add specs for all models

Add extra validations for all models ...

- Includes specs using the Shoulda gem
- Includes a refactoring of update_numbers to a "sortable" abstraction

Adding fixtures

Add RSpec gem for testing