New features

Added kernel tests for the module

• Adding support for Media and Role indexing in Solr

- Add configuration for the icon text
- Simplify the CSS

Issue #2868228 by pifagor: Replace deprecated usage of entity_create('node_type') with a direct call to NodeType::create()
Issue #2882039 by Munavijayalakshmi: Convert module to use short array syntax (new coding standard)
Issue #2890337 by sorinb: Bypass redirect cache context
Issue #2879186 by Falco010, Wilfred Waltman: Editors unable to access to translations pages with rabbit hole activated
Issue #2892282 by Leon Kessler: Rename behavior settings label to rabbit hole settings
Issue #2906587 by Dylan Donkersgoed: Page Redirect behaviour - languages

Initial D8 release