1. stat_created_plan.to_csv with option for details by template. ...

2. details attribute for stats table #1679
3. create_created_plan_service extended with details by template
4. create_last_month_created_plan_service extended with details by
template.
5. create_or_update strategy for generating stats
6. StatCreatedPlanByTemplateController#index for graphs usage
7. month_start_date and month_end_date for OrgDateRangeable class

[RD-1679] Usage view including date input for plans by template

[#1679] monthly_range query updated

[#1679] client-side chart for plans by template

[#1679] Time picker for plans by template chart

[#1679] Download plans by template action.

deleted spec

merge conflicts fixed

[#1679] Removed JS linter warnings

[#1679] Rubocop conforming code. Drying out stat services

Change column titles in usage CSV download ...

Fixes #1938

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