feat(accordion): add container switcher

[SvetlanaMuravlova]

Feature: replace the wrapper div of the accordion for styling
refs #4092

[codecov]

Codecov Report

Merging #6153 (ac65452) into development (2224b5f) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           development    #6153      +/-   ##
===============================================
+ Coverage        75.78%   75.89%   +0.11%     
===============================================
  Files              344      315      -29     
  Lines            10822    10643     -179     
  Branches          2575     2935     +360     
===============================================
- Hits              8201     8078     -123     
+ Misses            2611     2564      -47     
+ Partials            10        1       -9     

Impacted Files	Coverage Δ
src/accordion/accordion-group.component.html	100.00% <100.00%> (ø)
src/accordion/accordion-group.component.ts	93.54% <100.00%> (+6.45%)	⬆️
...picker/themes/bs/bs-custom-dates-view.component.ts	60.00% <0.00%> (-20.00%)	⬇️
src/datepicker/utils/bs-calendar-utils.ts	74.68% <0.00%> (-16.75%)	⬇️
src/sortable/sortable.component.ts	5.55% <0.00%> (-13.34%)	⬇️
src/dropdown/bs-dropdown.directive.ts	78.08% <0.00%> (-11.29%)	⬇️
src/tooltip/tooltip.directive.ts	57.04% <0.00%> (-7.30%)	⬇️
src/timepicker/reducer/timepicker.reducer.ts	86.00% <0.00%> (-6.00%)	⬇️
src/timepicker/timepicker.component.ts	87.70% <0.00%> (-5.12%)	⬇️
src/modal/modal.directive.ts	4.00% <0.00%> (-4.72%)	⬇️
... and 194 more

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[github-actions]

Visit the preview URL for this PR (updated for commit ac65452):

https://ngx-bootstrap-demo--pr6153-accordion-replace-di-gdg4eb5m.web.app

_{(expires Wed, 02 Feb 2022 12:51:16 GMT)}

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[cypress]

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Test summary

799 • 33 • 14 • 0

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Run details

Project	ngx-bootstrap
Status	Failed
Commit	ef17700 ℹ️
Started	Jan 26, 2022 12:52 PM
Ended	Jan 26, 2022 1:29 PM
Duration	37:05 💡
OS	Linux Ubuntu - 20.04
Browser	Electron 93

View run in Cypress Dashboard ➡️

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Failures

	typeahead_page_spec.ts		1
1	Typeahead demo page testing suite > On blur > clicking anywhere outside auto-fills "Option on blur" with the first option from the matches list
	datepicker/locales_spec.ts		2
1	Datepicker demo testing suite: Locales > Change Locale Datepicker > when user chose locale es-pr for "Datepicker", container shown in appropriate language
2	Datepicker demo testing suite: Locales > Change Locale DateRangepicker > when user chose locale es-pr for "Daterangepicker", container shown in this language
	modals_service_page_spec.ts		7
1	Modals demo page testing suite: Service examples > Component modals with interceptor > when user clicks on "No" button, doesn't close the modal
2	Modals demo page testing suite: Service examples > Nested modals > when user clicks on the button "Open second modal" then the second modal with title "Second modal" is opened, "Close self" is present
3	Modals demo page testing suite: Service examples > Events > when user closes modal by click on the cross then should be messages "onHide event has been fired" and "onHidden event has been fired"
4	Modals demo page testing suite: Service examples > Events > when user closes modal by pressing ESC button then modal is closed and should be messages "onHide event has been fired" and "onHidden event has been fired"
5	Modals demo page testing suite: Service examples > Confirm Window > when user clicks on "Open modal" button then modal is opened, it contains two buttons: "Yes" and "No"
6	Modals demo page testing suite: Service examples > Custom css class > when user clicks on the cross button then the modal is closed
7	Modals demo page testing suite: Service examples > Animation option > when user clicks on the cross button then the modal is closed
This comment includes only the first 10 test failures. See all 33 failures in the Cypress Dashboard.

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