Engine: editting foreman/config/settings.yaml and code blocks syntax
consistencies

- edit config/settings.yaml to set `:require_ssl: false`
- edit config/settings.yaml to set `:organizations_enabled: false`
- `rails s ` wasn't rendering as a code blocks
- consistent code block markdown syntax
Merge pull request #3392 from komidore64/readme2

Engine: editting foreman/config/settings.yaml and code blocks syntax