Add deleted_by to Trashable tables

spec/models/notification_spec.rb

@@ -215,7 +215,7 @@ describe Notification do
 
       Notification.create!(read: false, user_id: p2.user_id, topic_id: p2.topic_id, post_number: p2.post_number, data: '[]',
                            notification_type: Notification.types[:liked])
-      p2.trash!
+      p2.trash!(p.user)
 
       # we may want to make notification "trashable" but for now we nuke pm notifications from deleted topics/posts
       Notification.ensure_consistency!

spec/models/topic_spec.rb

@@ -1296,16 +1296,17 @@ describe Topic do
 
   describe 'trash!' do
     context "its category's topic count" do
+      let(:moderator) { Fabricate(:moderator) }
       let(:category) { Fabricate(:category) }
 
       it "subtracts 1 if topic is being deleted" do
         topic = Fabricate(:topic, category: category)
-        expect { topic.trash! }.to change { category.reload.topic_count }.by(-1)
+        expect { topic.trash!(moderator) }.to change { category.reload.topic_count }.by(-1)
       end
 
       it "doesn't subtract 1 if topic is already deleted" do
         topic = Fabricate(:topic, category: category, deleted_at: 1.day.ago)
-        expect { topic.trash! }.to_not change { category.reload.topic_count }
+        expect { topic.trash!(moderator) }.to_not change { category.reload.topic_count }
       end
     end
   end

spec/models/user_action_spec.rb

@@ -62,7 +62,7 @@ describe UserAction do
 
       other_stats.should == expecting
 
-      public_topic.trash!
+      public_topic.trash!(user)
       stats_for_user.should == []
       stream_count.should == 0