tests: replace workoff_active_jobs with perform_enqueued_jobs.

test/unit/artist_test.rb

@@ -93,7 +93,7 @@ class ArtistTest < ActiveSupport::TestCase
       end
 
       should "create a new tag implication" do
-        workoff_active_jobs
+        perform_enqueued_jobs
         assert_equal(1, TagImplication.where(:antecedent_name => "aaa", :consequent_name => "banned_artist").count)
         assert_equal("aaa banned_artist", @post.reload.tag_string)
       end