EZP-22146: fixed: assert assignment type
EZP-22146: implemented loadRoleAssignmentsByRoleId()
EZP-22146: fixed getRoleAssignments()
EZP-22146: implemented removal of roles from all users/groups
EZP-22146: remove usage of SPI Role::groupIds
EZP-22146: remove SPI Role::groupIds
EZP-22146: add test for loadRoleAssignmentsByRoleId()
EZP-22146: move removal of all assignments to Role Gateway::deleteRole()
EZP-22146: removed deprecated column and join