use pdo for postgres setup

Allow to change user preferences via occ

Fix PHPUnit 5.4 warnings in files_sharing tests

Fix PHPUnit 5.4 warnings in DAV app

* getMock is deprecated

PasswordLoginForbidden is not a FATAL exception

It is just a 'Sabre\DAV\Exception\NotAuthenticated' exception
with some special meaning.

So just log it as DEBUG and not as FATAL.

Fix hidden file list master

Cleanup ManagerTest

Ignore users personal mimetype configs

* Fix deprecated getMock call
* No longer requires DB

updated license script and readme

add some information for contributors regarding the copyright header and claify that all contributions are considered AGPLv3 or later

- check if all changes to a file happened after the fork, this allows the authors to check if the file can be relicensed to AGPLv3 or later

RootTest does not require DB

Split CI in DB & NODB

Fix warnings from building docs

* Removed from DB group
* Also mock the manager
* Fixed deprecated getMock warnings

Use tooltip for background jobs info tooltip