Cleanup OC_Config mess

OC_Helper::makeURLAbsolute is not used anymore

Use the query builder for the joblist queries

Remove unneeded methods in OC_Helper

We were still using the lecagy class OC_Config all over the place. Which
was a wrapper around the new class OC\Config

Exclude scrutinizer-auto-fixer

Use proper public API for OC_Helper::getFileNameMimeType

Cleanup OC_User deprecated methods

Assert that there are no xml error left

[3rdparty] Bump doctrine deps

Replace deprecated OC_Helper::linkToRoute calls

Add a default size to the avatar placeholders

Replaced all calls to OC_Helper::linkToRoute with
OC::$server->getURLGenerator()->linkToRoute

Add carddav backend to OCP\ContactsManager

This removed the need to do an avatar request on the "empty" row in the
user settings.

user management: show password error temporary

Replaced with proper OCP calls