Update autoloader Integrated Solr bundle from PSR-0 to PSR-4

Description

Upgrade the autoloader (in composer.json) to PSR-4. The PSR-0 is deprecated: http://www.php-fig.org/psr/psr-0/

Technical tasks

None

Deployment actions

None

Status

Assignee

Unassigned

Client

Integrated Marijn

Sprint

None

Fix versions

Configure