Merge branch 'fix-migration' into 'ce-to-ee-2017-07-08'

Fix bad arguments passed to BackgroundMigrationWorker

See merge request !2398

db/migrate/20170626202753_update_authorized_keys_file.rb

@@ -101,7 +101,7 @@ class UpdateAuthorizedKeysFile < ActiveRecord::Migration
   end
 
   def update_authorized_keys_file_since(cutoff_datetime)
-    job = ['UpdateAuthorizedKeysFileSince', [cutoff_datetime]]
+    job = [['UpdateAuthorizedKeysFileSince', [cutoff_datetime]]]
     BackgroundMigrationWorker.perform_bulk(job)
   end
 end