EZP-29290: As an Editor, I want to have preconfigured "Author" section while creating the content

[konradoboza]

Question	Answer
Tickets	EZP-29290
Bug fix?	no
New feature?	yes
BC breaks?	no
Tests pass?	yes
Doc needed?	yes
License	GPL-2.0

JIRA excerpt:

Currently, in v2 there is no preconfigured author section (fields filled in with the name and e-mail of the currently logged user). It would be more convenient for the editors to have this fields set automatically while creating a new content. Also, prefilling section with the default data should be configurable at the Author FieldType level.

Depends on:

• EZP-29290: As an Editor, I want to have preconfigured "Author" section while creating the content ezpublish-kernel#2392
• EZP-29290: Author Field Type prefilled with empty value by default ezpublish-kernel#2417
• EZP-29290: As an Editor, I want to have preconfigured "Author" section while creating the content repository-forms#251

Checklist:

• Coding standards ($ composer fix-cs)
• Ready for Code Review