This is Symfony Standard Edition (based on Symfony 2.7.19 currently) with fduch/workflow-bundle installed. You can see example how workflow can be configured in workflow.yml file.
Due to BC-breaks introduced in Workflow component and FrameworkBundle inside 3.2-branch (symfony/symfony#20462) please refer to (1.x) branch of the fduch/workflow-bundle with symfony/workflow component in old versions up to cdddaeec794e4096f2f80f0298fc1a4b5bfacb83 (non-including) and (master) branch otherwise. Current (master) version uses
master
version of fduch/workflow-bundle