0.11: Accordion Configuring defaults example
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**Primary Actor**: User

**Scope**: Ngx-bootstrap DEMO / BS version 3&4

**Goal**: Show user example with configuring default values in accordion

Main success scenario:
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1. User open Accordion demo page
2. User click on Configuring defaults sub-menu
3. User able to click on each item of 3
4. Src of component show how to override AccordionConfig
5. When user click on the one item, then content is shown
6. When user click on the other item, it's one is opened and previous one is closed

Extensions:
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6a. If component overrides with closeOthers: true parameter

Variations:
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2*. User scroll to Configuring defaults sub-menu