Issue #2355969 by Berdir: Fixed left-over watchdog() call and current language ->id to getId() changes.
Issue #2355623 by Berdir: Fixed Configurable fields for entity types without bundle key (e.g., users) are not displayed.
Issue #2362671 by Berdir: Renamed getCacheTag() to getCacheTags().
Issue #2282519 by drunken monkey: Changed "entity" dependency key in test config install YAMLs to "config".
Remove drupal_strtolower, replace it with Unicode::strtolower
Remove drupal_strlen, replace it with Unicode::strlen
[#2349435] Checking work on seperating filters/processors by stage.

  Changes Index::getProcessors to return per-stage.
  Enables different weighting and status for processors per stage.
  Changed UI to seperate processors into different stages.
Merge branch '2349435-seperate-processors-by-stage' of git.drupal.org:sandbox/daeron/2091893 into 2349435-seperate-processors-by-stage