Issue #2364161 by dawehner, mpdonadio, Wim Leers: Replace nearly all existing  _l calls.
Issue #2069619 by rpayanm, tstoeckler: Remove the module handler dependency from BlockContentBlock.
Issue #2361825 by rpayanm: Remove drupal_strtolower.
Merge branch '8.0.x' into 8.0.x-2206571-config-unit-tests